Rubber Bulbs | McMaster-Carr

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17 Products

Bulb Dispensers


Flat-Top Bulb with Clear Stem	With Semi-Clear Stem	With Silver Stem	With Clear Stem

Also known as basters, these dispensers transfer larger amounts of liquid than bulb droppers. Liquids are dispensed in a stream, rather than drop by drop. These dispensers are two pieces, so you can remove the bulb for easy cleaning.

Polystyrene Stem and Polyethylene Stem—Polystyrene and Polyethylene dispensers resist shattering and denting from impact better than glass and stainless steel dispensers.

Stainless Steel Stem—Stainless steel dispensers are more durable than plastic and glass dispensers. They also withstand high heat.

Tempered Glass Stem—Tempered glass dispensers resist staining better than plastic dispensers. They also withstand high heat.

Clear—Clear dispensers let you see the liquid inside and confirm the exact volume, unlike silver dispensers.

Semi-Clear Stem—Semi-clear dispensers let you see the liquid inside and confirm the exact volume, unlike silver dispensers.

Stainless Steel Injector Tip—Dispensers with an injector tip can puncture through a surface to dispense liquid on the inside.

Flat-Top Bulb—Dispensers with a flat-top bulb can rest standing up to prevent dripping between uses.

			Stem			Bulb
Cap.	Graduations	Lg.	OD	Material	Color	Material	Color	Max. Temp., ° F	Includes	Features		Each
30 ml, 1 fl. oz.	1/4 oz., 7.5 ml	11 3/4"	1"	Polystyrene	Clear	Rubber	Red	500	Cleaning Brush	Flat-Top Bulb	1990T21	000000
45 ml, 1 1/2 fl. oz.	1/4 oz.	10 1/2"	7/8"	Polyethylene	Semi-Clear White	Rubber	Black	210	—	—	1990T23	0000
60 ml, 2 fl. oz.	—	10 1/4"	7/8"	Stainless Steel	Silver	Rubber	Orange	500	Cleaning Brush, Stainless Steel Injector Tip	—	1990T24	00000
60 ml, 2 fl. oz.	1/2 oz.	10 1/2"	15/16"	Tempered Glass	Clear	Rubber	Orange	450	—	—	1990T25	00000

Pipette Bulbs

Bulb with

Control

Valves

The simplest form of a pipette pump, these bulbs let you control flow as you quickly draw and dispense liquid. Use them with two hands to ensure they don’t separate from pipettes (not included).

Control Valves—Bulbs with control valves are more precise than bulbs without control valves. They have three valves—one empties air from the bulb, one suctions liquid into the pipette, and one empties the pipette.

		Bulb
	For Pipette Cap. Range, ml	Dia.	Lg.	Material	Color	Features		Each
Bulb



		10 to 100	2 3/16"	5 7/8"	Natural Rubber	Red	Control Valves	5809N11	000000

Bulb Droppers

Removable

Bulb

Squeeze the bulb to dispense liquids one drop at a time. These droppers are also known as transfer pipettes.

Removable Bulb—Removable bulb droppers are easy to clean.

Soda-Lime Glass Stem—Soda-lime glass droppers are easier to see through than plastic droppers, and they’re less likely to stain. They withstand chemicals, so you can sterilize them for repeated use.

			Stem			Bulb
	Cap.	Lg.	OD	Material	Color	Material	Color	Pkg. Qty.		Pkg.
Packs







				Removable Bulb

				0.017 fl. oz./0.5 ml	3"	1/4"	Polyethylene	Semi-Clear White	Rubber	Black	1	4168T11	00000


				0.034 fl. oz./1 ml	4"	1/4"	Soda-Lime Glass	Clear	Rubber	Black	2	4168T22	0000
				0.034 fl. oz./1 ml	4 1/2"	1/4"	Polyethylene	Semi-Clear White	Rubber	Black	1	4168T12	0000

Pipette Pumps


Plunger	Bulb

Draw and dispense liquids at a controlled speed. These pumps give you more control of flow than a basic pipette bulb but not as much as an electronic pump. Use them with a pipette (not included).

Plunger—Plunger pumps can be used with one hand. Turn the thumbwheel to draw liquid into the pipette then press the plunger for quick dispensing. For gradual dispensing, you can use the thumbwheel.

Bulb—Bulb pumps have a lever to set both the aspirating and dispensing speeds. Press the button above the lever to blow out any residual liquids.

		Pump
	For Pipette Cap. Range, ml	Lg.	Material	Removes Particle Size Down To, μm	Body Material	Autoclavable	Features		Each
Plunger



		1 to 2	7 1/8"	TPE	—	Polypropylene	Yes	—	41405T7	000000


		2 to 10	7 1/8"	TPE	—	Polypropylene	Yes	—	41405T8	00000


		Bulb



				0.1 to 100	8"	Silicone Rubber	3	ABS	Yes	Filter	7318T5	00000

Replacement Filters

Removes Particle Size Down To, μm		Each
3	7318T51	00000

Miniature Light Bulb Changers

Style B

Replace small bulbs in cramped areas such as control panels, instrument enclosures, or automotive dashboards. These changers help you grip miniature bulbs without leaving behind oil from your fingers that can cause bulbs to burn out.

Style B—Each end fits different bulb sizes.

For Bulb Dia.	Overall Lg.	Material		Each



B	1/4" to 3/8" and 3/4" to 1"	3"	Rubber	9820K1	000000

Electronic Pipette Pumps


		LED Display

Pipette for hours on end—these ergonomic pipettors maintain even flow with just the push of a button. With a set speed, you can carefully monitor the quantities aspirated and dispensed. Choose from six aspirating and dispensing speeds—dispense as fast as 5 ml per second. Choose a higher speed when working with viscous liquids. An LED display shows your speed and battery status. To ensure contamination-free pipetting, the nose on these pumps is autoclavable.

		Pump
	For Pipette Cap. Range, ml	Lg.	Ht.	Material	Removes Particle Size Down To, μm	Cone Material	Batteries Included	Autoclavable	Includes	Features		Each
Piston



		1 to 100	5"	5 1/4"	ABS	45	Silicone Rubber	Yes	Yes	Charger	Adjustable Speed, Filter	5805N11	0000000

Replacements for Pipette Pumps

			Electrical
Input Connection Type	Input Current, amp	Input Voltage, V AC	Connection	No. of Blades		Each
Plug In	0.2	120	Straight Blade	2	5805N14	000000