PYREX 4mm Straight Bore Stopcock with Solid Glass

Corning This PYREX® straight bore stopcock has a No. 4 Standard Taper glass stopper plug with a 4mm diameter bore. Stopcock sidearms have a 10mm O. D. Closely controlled grinding techniques allow this general use stopcock to be used at pressures down to 10{-4} torr (mm Hg) when correctly greased. For additional strength, sidearm seals are heavy and uniform. For replacement stopcock plugs, see No. 7680-4; for replacement retaining clips, see No. 7280-4CO. - COG