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

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

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 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.