McMaster-Carr logo
    Filter by
    Construction
    System of Measurement
    Filter Type
    Pores per Inch
    Reusable
    Filtering Method
    MERV Filter Rating
    Industrial Info Snippet
    Air Filter Performance
    Application
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Gasket Material
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    104 Products
    About Air Filter Efficiency Ratings
    industrial info icon

    Compare MERV rating, efficiency, and particle size to find the right filter for your location—from warehouses and offices to hospitals and labs.

    Low-Efficiency Reusable Air Filter Media

    Wash and reuse this media to extend the life of expensive filters that catch fine particles. Installed upstream, this affordable media traps debris that can damage or clog your final filter. Cut it to the size you need and attach it to a frame.
    Polyurethane Foam Rolls
    Image of Product. Front orientation. Air Filter Media. Low-Efficiency Reusable Air Filter Media, Rolls.
    Pores per Inch—Media containing more pores per inch catch smaller particles than media with fewer pores per inch.
    Wd.
    MERV Filter
    Rating
    Max. Temp.,
    ° F
    Specs.
    Met
    Choose a Number
    of Pores per Inch
    5 ft.
    Long
    10 ft.
    Long
    25 ft.
    Long
    1/8" Thick
    8"Not Rated200UL 900
    30
    ,
    60
    2195K301
    00000
    00000
    000000
    12"Not Rated200UL 900
    30
    ,
    60
    2195K305
    0000
    00000
    00000
    24"Not Rated200UL 900
    30
    ,
    60
    2195K309
    00000
    00000
    00000
    36"Not Rated200UL 900
    30
    ,
    60
    2195K314
    00000
    00000
    00000
    48"Not Rated200UL 900
    30
    ,
    60
    2195K318
    00000
    00000
    00000
     
    1/4" Thick
    8"Not Rated200UL 900
    30
    ,
    60
    2195K302
    00000
    00000
    00000
    12"Not Rated200UL 900
    30
    ,
    60
    2195K306
    00000
    00000
    00000
    24"Not Rated200UL 900
    30
    ,
    60
    2195K311
    00000
    00000
    00000
    36"Not Rated200UL 900
    30
    ,
    60
    2195K315
    00000
    00000
    000000
    48"Not Rated200UL 900
    30
    ,
    60
    2195K319
    00000
    00000
    000000
     
    1/2" Thick
    8"Not Rated200UL 900
    30
    ,
    60
    2195K303
    00000
    00000
    00000
    12"Not Rated200UL 900
    30
    ,
    60
    2195K307
    00000
    00000
    00000
    24"Not Rated200UL 900
    30
    ,
    60
    2195K312
    00000
    00000
    000000
    36"Not Rated200UL 900
    30
    ,
    60
    2195K316
    00000
    000000
    000000
    48"Not Rated200UL 900
    30
    ,
    60
    2195K321
    00000
    000000
    000000
     
    1" Thick
    8"Not Rated200UL 900
    30
    ,
    60
    2195K304
    00000
    00000
    000000
    12"Not Rated200UL 900
    30
    ,
    60
    2195K308
    00000
    00000
    000000
    24"Not Rated200UL 900
    30
    ,
    60
    2195K313
    00000
    000000
    000000
    36"Not Rated200UL 900
    30
    ,
    60
    2195K317
    000000
    000000
    000000
    48"Not Rated200UL 900
    30
    ,
    60
    2195K322
    000000
    000000
    000000
     
    Polyurethane Foam Pads
    Image of Product. Front orientation. Air Filter Media. Low-Efficiency Reusable Air Filter Media, Pads.
    Pores per Inch—Media containing more pores per inch catch smaller particles than media with fewer pores per inch.
    HVAC Filter
    Trade Size
    MERV Filter
    Rating
    Max. Temp.,
    ° F
    Specs.
    Met
    Choose a Number of
    Pores per Inch
    Each
    1/8" Thick
    12 × 12Not Rated250UL 900
    30
    ,
    60
    9803K30100000
    12 × 24Not Rated250UL 900
    30
    ,
    60
    9803K3060000
    16 × 20Not Rated250UL 900
    30
    ,
    60
    9803K3120000
    16 × 25Not Rated250UL 900
    30
    ,
    60
    9803K3170000
    20 × 20Not Rated250UL 900
    30
    ,
    60
    9803K3230000
    20 × 25Not Rated250UL 900
    30
    ,
    60
    9803K32800000
    24 × 24Not Rated250UL 900
    30
    ,
    60
    9803K33400000
    48 × 72Not Rated250UL 900
    20
    ,
    45
    ,
    65
    ,
    80
    ,
    100
    9803K200000
     
    1/4" Thick
    12 × 12Not Rated250UL 900
    30
    ,
    60
    9803K3020000
    12 × 24Not Rated250UL 900
    30
    ,
    60
    9803K3070000
    16 × 20Not Rated250UL 900
    30
    ,
    60
    9803K3130000
    16 × 25Not Rated250UL 900
    30
    ,
    60
    9803K31800000
    20 × 20Not Rated250UL 900
    30
    ,
    60
    9803K32400000
    20 × 25Not Rated250UL 900
    30
    ,
    60
    9803K32900000
    24 × 24Not Rated250UL 900
    30
    ,
    60
    9803K33500000
    48 × 72Not Rated250UL 900
    20
    ,
    45
    ,
    65
    ,
    80
    ,
    100
    9803K300000
     
    1/2" Thick
    12 × 12Not Rated250UL 900
    30
    ,
    60
    9803K3030000
    12 × 24Not Rated250UL 900
    30
    ,
    60
    9803K30800000
    16 × 20Not Rated250UL 900
    30
    ,
    60
    9803K31400000
    16 × 25Not Rated250UL 900
    30
    ,
    60
    9803K31900000
    20 × 20Not Rated250UL 900
    30
    ,
    60
    9803K32500000
    20 × 25Not Rated250UL 900
    30
    ,
    60
    9803K33100000
    24 × 24Not Rated250UL 900
    30
    ,
    60
    9803K33600000
    48 × 72Not Rated250UL 900
    20
    ,
    45
    ,
    65
    ,
    80
    ,
    100
    9803K4000000
     
    1" Thick
    12 × 12Not Rated250UL 900
    30
    ,
    60
    9803K30400000
    12 × 24Not Rated250UL 900
    30
    ,
    60
    9803K30900000
    16 × 20Not Rated250UL 900
    30
    ,
    60
    9803K31500000
    16 × 25Not Rated250UL 900
    30
    ,
    60
    9803K32100000
    20 × 20Not Rated250UL 900
    30
    ,
    60
    9803K32600000
    20 × 25Not Rated250UL 900
    30
    ,
    60
    9803K33200000
    24 × 24Not Rated250UL 900
    30
    ,
    60
    9803K33700000
    48 × 72Not Rated250UL 900
    20
    ,
    45
    ,
    65
    ,
    80
    ,
    100
    9803K6000000
     
    2" Thick
    12 × 12Not Rated250UL 900
    30
    ,
    60
    9803K30500000
    12 × 24Not Rated250UL 900
    30
    ,
    60
    9803K31100000
    16 × 20Not Rated250UL 900
    30
    ,
    60
    9803K31600000
    16 × 25Not Rated250UL 900
    30
    ,
    60
    9803K32200000
    20 × 20Not Rated250UL 900
    30
    ,
    60
    9803K32700000
    20 × 25Not Rated250UL 900
    30
    ,
    60
    9803K33300000
    24 × 24Not Rated250UL 900
    30
    ,
    60
    9803K33800000
    48 × 72Not Rated250UL 900
    20
    ,
    45
    ,
    65
    ,
    80
    ,
    100
    9803K7000000
     

    Reusable Air Filter Media for Electronics

    Image of Product. Front orientation. Air Filter Media. Reusable Air Filter Media for Electronics.
    Wash and reuse this media to keep the air in your electronics clean. It won't break down when exposed to prolonged heat and humidity. Cut it to the size you need.
    HVAC Filter
    Trade Size
    MERV Filter
    Rating
    Specs.
    Met
    1/4"
    Thick
    1/2"
    Thick
    1"
    Thick
    8 × 8Not RatedUL 9005307T212
    00000
    00000
    00000
    10 × 10Not RatedUL 9005307T213
    0000
    00000
    00000
    10 × 20Not RatedUL 9005307T214
    00000
    00000
    00000
    14 × 14Not RatedUL 9005307T215
    00000
    00000
    00000
    16 × 20Not RatedUL 9005307T216
    00000
    00000
    00000
    16 × 25Not RatedUL 9005307T217
    00000
    00000
    00000
    20 × 20Not RatedUL 9005307T218
    00000
    00000
    00000
    20 × 25Not RatedUL 9005307T219
    00000
    00000
    000000
    20 × 30Not RatedUL 9005307T222
    00000
    00000
    000000
    24 × 24Not RatedUL 9005307T221
    00000
    00000
    00000

    Low-Efficiency Reusable Air Filter Media Selector Packs

    Image of Product. Front orientation. Air Filter Media. Low-Efficiency Reusable Air Filter Media Selector Packs.
    Determine the right pores per inch for your air filtering application. Each sample piece has a different pore size.
    Pores per Inch—Media containing more pores per inch catch smaller particles than media with fewer pores per inch.
    Pores per In.
    Wd.
    Lg.
    Thk.
    MERV Filter
    Rating
    Specs.
    Met
    No. of
    Pieces
    Each
    20, 45, 65, 80, 1006"6"1/8"Not RatedUL 90059803K99000000
    30, 603"3"1/4"Not RatedUL 90022195K990000

    Dust Collector Filters for Abrasive Blasting Cabinets

    Image of Product. Front orientation. Dust Collector Filters. Dust Collector Filters for Abrasive Blasting Cabinets.
    For
    Mfr.
    For Mfr.
    Model No.
    Material
    Reusable
    Each
    Filter Cartridges
    CadillacDC-1Foam, PaperYes31205K230000000
     

    Reinforced Reusable Air Filter Media

    Image of Product. Front orientation. Air Filter Media. Reinforced Reusable Air Filter Media.
    Wrapped in aluminum mesh for added support, this filter media can be used without a frame. Just cut it to the size you need. When it gets dirty, wash and reuse it.
    5 ft. Long
    10 ft. Long
    25 ft. Long
    Wd.
    MERV Filter
    Rating
    Max. Temp.,
    ° F
    Specs.
    Met
    Each
    Each
    Each
    1/2" Thick
    15 1/8"4
    250UL 9002072K210000002072K110000002072K30000000
    19 1/8"4
    250UL 9002072K23000002072K12000002072K4000000
    24 1/8"4
    250UL 9002072K25000002072K130000002072K5000000
     
    1" Thick
    15 1/8"4
    250UL 9002072K22000002072K14000002072K6000000
    19 1/8"4
    250UL 9002072K24000002072K150000002072K7000000
    24 1/8"4
    250UL 9002072K26000002072K160000002072K8000000
     

    EMI/RFI Shielding Electrical Enclosure Vents

    Image of Product. Front orientation. Electrical Enclosure Vents. EMI/RFI Shielding Electrical Enclosure Vents.
    These conductive aluminum screens block electromagnetic interference (EMI) and radio frequency interference (RFI) to prevent electrical problems such as radio static and faulty signals. Made of mesh, they let air flow through, so the pressure in your enclosure stays constant as temperatures fluctuate.
    Screw through the vent frame to mount on the surface of your enclosure. A shielded foam gasket fills the gap between the enclosure and the vent.
    Interference Reduction @ Frequency—Also known as attenuation, interference reduction at frequency measures how much interference is blocked. These vents have high attenuation and work for most applications.
    For
    Opening
    Overall
    Mounting
    Holes
    Wd.
    Ht.
    Wd.
    Ht.
    Dp.
    Interference Reduction
    @ Freq.
    Frame Material
    Screen Material
    Gasket Material
    Mounting Fasteners
    Included
    No.
    of
    Dia.
    Each
    2"2"3"3"3/4"52 dB @ 1 GHzChromate-Conversion-Coated AluminumChromate-Conversion-Coated AluminumPolyurethane FoamNo41/4"5316N110000000
    3"3"4"4"3/4"52 dB @ 1 GHzChromate-Conversion-Coated AluminumChromate-Conversion-Coated AluminumPolyurethane FoamNo41/4"5316N12000000
    4"4"5"5"3/4"52 dB @ 1 GHzChromate-Conversion-Coated AluminumChromate-Conversion-Coated AluminumPolyurethane FoamNo61/4"5316N13000000
    5"5"6"6"3/4"52 dB @ 1 GHzChromate-Conversion-Coated AluminumChromate-Conversion-Coated AluminumPolyurethane FoamNo81/4"5316N15000000
    6"4"7"5"3/4"52 dB @ 1 GHzChromate-Conversion-Coated AluminumChromate-Conversion-Coated AluminumPolyurethane FoamNo61/4"5316N14000000

    Snap-In Breather Vents

    Image of Product. Front orientation. Breather Vents. Snap-In Breather Vents.
    These vents have louvers with foam filters to keep out dust and liquids. Use them to maintain consistent pressure as temperatures fluctuate by allowing air to flow through sealed enclosures.
    For
    Knockout
    Trade
    Size
    Dia.
    Head
    Dia.
    For Max.
    Panel Thk.
    Environment
    Color
    Flammability
    Rating
    Each
     
    Nylon
    1"1 1/4"1/8"Indoor OnlyBlackUL 94 V-2
    7066K2100000
    1 1/2"1 11/16"1/8"Indoor OnlyBlackUL 94 V-2
    7066K80000
    1/2
    7/8"1"1/8"Indoor OnlyBlackUL 94 V-2
    7066K50000
    3/4
    1 1/8"1 1/4"1/8"Indoor OnlyBlackUL 94 V-2
    7066K60000
    1
    1 3/8"1 1/2"1/8"Indoor OnlyBlackUL 94 V-2
    7066K70000
    1 1/2
    2"2 3/16"1/8"Indoor OnlyBlackUL 94 V-2
    7066K220000
    2
    2 1/2"2 3/4"1/4"Indoor OnlyBlackUL 94 V-2
    7066K230000
    2 1/2
    3"3 3/16"1/4"Indoor OnlyBlackUL 94 V-2
    7066K240000
     
    back to top