The Bellco Pipette Plugger is designed for plugging a full range of standardizedcotton plugging pipettes. This unit has three speeds and can be adjusted quicklyand easily to plug 40, 50 or 60 pipettes per minute. The unit will produce uniformshape cotton plugs, minimizing the problem of tight and loose plugs. Machine isportable with a convenient carrying handle. Time tested design with a precisionGeneva mechanism.--Speed Range: 3 Settings, Approximately 40/50/60 Pipettes/Minute--Weight: 19 Lbs. (9.0 Kg)--Operates In: Continuous Or Actuate Mode--Supplied With 1 Bag Of Cotton Roving 7750-22222. MADE IN THE USA