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    System of Measurement
    System of Measurement
    Inch
    Metric
    Duct Size
    Duct Size
    3
    4
    5
    6
    7
    8
    9
    10
    12
    14
    15
    16
    18
    20
    22
    24
    30
    Flexibility
    Flexibility
    Very FlexibleFlexible
    Rigid
    DFARS (Defense Acquisition Regulations Supplement)
    DFARS (Defense Acquisition
    Regulations Supplement)
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    Interior Surface Texture
    Interior Surface Texture
    Ribbed
    Smooth
    RoHS (Restriction of Hazardous Substances)
    RoHS (Restriction of
    Hazardous Substances)
    RoHS Compliant
    Maximum Vacuum
    Maximum Vacuum
    0.01 in. of Hg @ 72° F
    0.02 in. of Hg @ 72° F
    0.03 in. of Hg @ 72° F
    0.05 in. of Hg @ 72° F
    0.07 in. of Hg @ 72° F
    0.1 in. of Hg @ 72° F
    0.2 in. of Hg @ 72° F
    0.3 in. of Hg @ 72° F
    0.4 in. of Hg @ 72° F
    0.5 in. of Hg @ 72° F
    0.6 in. of Hg @ 72° F
    0.7 in. of Hg @ 72° F
    0.8 in. of Hg @ 72° F
    1 in. of Hg @ 72° F
    1.1 in. of Hg @ 72° F
    1.2 in. of Hg @ 72° F
    1.3 in. of Hg @ 72° F
    1.5 in. of Hg @ 72° F
    1.7 in. of Hg @ 72° F
    1.8 in. of Hg @ 72° F
    1.9 in. of Hg @ 72° F
    2 in. of Hg @ 72° F
    2.2 in. of Hg @ 72° F
    2.5 in. of Hg @ 72° F
    2.7 in. of Hg @ 72° F
    2.8 in. of Hg @ 72° F
    3 in. of Hg @ 72° F
    3.1 in. of Hg @ 72° F
    3.2 in. of Hg @ 72° F
    3.3 in. of Hg @ 72° F
    3.5 in. of Hg @ 72° F
    3.7 in. of Hg @ 72° F
    4 in. of Hg @ 72° F
    4.5 in. of Hg @ 72° F
    4.7 in. of Hg @ 72° F
    5 in. of Hg @ 72° F
    5.5 in. of Hg @ 72° F
    6 in. of Hg @ 72° F
    6.1 in. of Hg @ 72° F
    6.4 in. of Hg @ 72° F
    6.5 in. of Hg @ 72° F
    7 in. of Hg @ 72° F
    7.2 in. of Hg @ 72° F
    7.5 in. of Hg @ 72° F
    8 in. of Hg @ 72° F
    9 in. of Hg @ 72° F
    9.5 in. of Hg @ 72° F
    10 in. of Hg @ 72° F
    10.5 in. of Hg @ 72° F
    11 in. of Hg @ 72° F
    11.5 in. of Hg @ 72° F
    12 in. of Hg @ 72° F
    13 in. of Hg @ 72° F
    13.5 in. of Hg @ 72° F
    14 in. of Hg @ 72° F
    15 in. of Hg @ 72° F
    16 in. of Hg @ 72° F
    17 in. of Hg @ 72° F
    18 in. of Hg @ 72° F
    19 in. of Hg @ 72° F
    20 in. of Hg @ 72° F
    21 in. of Hg @ 72° F
    22 in. of Hg @ 72° F
    23 in. of Hg @ 72° F
    24 in. of Hg @ 72° F
    25 in. of Hg @ 72° F
    26 in. of Hg @ 72° F
    26.5 in. of Hg @ 72° F
    27 in. of Hg @ 72° F
    28 in. of Hg @ 72° F
    29 in. of Hg @ 72° F
    Not Rated
    REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)
    REACH (Registration,
    Evaluation, Authorization
    and Restriction of Chemicals)
    REACH Compliant
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