Feature●Lightweight manual pipet controller does not require batteries●Squeeze bulb creates pressure to draw fluid up into pipets; up to 50Ml per squeeze●Ergonomic thumb lever controls speed of aspirating and dispensing●Press button blows out remaining drops in pipet and is compatible with 1-100ml serological pipetsDescription Manual pipet controller is comfortable and easy to use. Includes 3µm syringe filter (additional replacement filters available separately, PN 230211). easy disassembly when needed to clean. Non-Sterile.