PTFE stopcock plug
· Graduated with double white ceramic enamel scale; right side ascends and left side descends
· Calibrated to contain
· Pennyhead glass stopper supplied
· Replacement stopper is 850100; replacement stopcock plug is 821001-0002
· Designed from ASTM Specification E1096, Type 1C requirements
· Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements