Made of natural rubber Can accommodate pipettes up to 50mL 1/4" diameter opening Two valve system with a removable top valve for easy cleaning and one-handed use Available in red, black, blue, green, and yellow

The 3-Valve Pipette Filler is available in chemically-resistant silicone rubber. The bulb accommodates pipettes up to 50mL and has a 1/4 inch diameter opening. Silicone construction

Our PVC deluxe vacuum pressure bulb is ideal for gas aspirating duties. Length: 111mm without valves; diameter 57mm.

Includes one each of Red, Black, Green, and Blue natural rubber three valve pipette filler for use with pipettes up to 100mL.

Includes one natural rubber red three valve pipette filler, one silicon three valve pipette filler, one red natural rubber two valve "FLIP" style pipette filler, and one natural rubber three valve multicolored pipette filler.

Made from all natural rubber Will accommodate pipettes up to 50ml Features a 1/4 inch diameter opening This filler eliminates the need for dangerous mouth pipetting. They are available in red, black, blue, green, and multi-colored.

Includes one each of Red, Black, Green, Yellow, and Blue two valve, natural rubber "FLIP" style pipette filler for use with pipettes up to 100mL.