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