Two piece molded polyethylene stopcock. Parts snap together forming a tight seal and the free-turning key needs no lubrication. A quarter turn shuts off flow. Maximum pressure rating 48 kPa (7 psi), 50 cm of water.
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Colonial Scientific has teamed up with the industry leaders, Fisher Scientific and VWR, and now offers their entire product line. Colonial Scientific provides any part from the Fisher Scientific site with a part number.