Stoppers and Stopcocks

High vacuum stopcock that eliminates exposure to corrosive materials. Use to at least 13.

High vacuum stopcock that eliminates exposure to corrosive materials. Use to at least 13.

High vacuum stopcock that eliminates exposure to corrosive materials. Use to at least 13.

Easy action PTFE plug with hooded handle, threaded into heavy wall glass barrel, permits smooth adjustment. Arms are at 90 degree angle.

High vacuum stopcock that eliminates exposure to corrosive materials. Use to at least 13.

High vacuum stopcock that eliminates exposure to corrosive materials. Use to at least 13.

High vacuum stopcock that eliminates exposure to corrosive materials. Use to at least 13.

High vacuum stopcock that eliminates exposure to corrosive materials. Use to at least 13.

Chromatographic column with integral reservoir at top, and 2 mm bore 1:5 taper PTFE stopcock plug at bottom. Opening at top is either 24/40 outer joint or opening for #3 stopper.

Separatory funnels, from 125ml to 5 liter. These funnels feature a detachable PTFE drip tip which is not easy to break and is easier to keep clean.

Smith Buret for dispensing precise quantities of liquids. The wide base adds stability when placed on a balance pan.

Cylindrical with joint at top and bottom, drip stem, and double scale graduations, calibrated from stopcock. Drip stem does not extend beyond the joint, thereby eliminating a possible source of breakage. PTFE or metering valve stopcock plug.