Thomas 3385 Mini Variable Speed Peristaltic Tubing Pump with Low Flow, 120V Power Supply, 0.03-8.2mL/min Flow Rate, 6-5/8" Length x 4-3/4" Width x 4-1/2" Thick No valves to clog or seals to leak Tubing may be sterilized by autoclave Pump has a purge/prime switch Comes ready-to-use One-year warranty