No tip o-ring exposure

·         Designed with a precision external thread for fine control

·         Can be used as a bleed up to 1/2 turn

·         Full open position is at 1-1/2 turns

·         Primary seal is made with a FKM o-ring on a tapered seat

·         Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements