Ace Glass 7395-48 7395 Gas Collecting Bulb Ace-Thred, 1000ml

Designed with #7 Ace-Thred end valves that insure tight fit without grease. No stopcock plugs to "pop out." Nylon bushing tightens into the internally threaded glass to form an O-Ring compression seal. Operation: With bushings at fingertip tightness, push plungers into bulb until flow holes are inside O-Rings (enlarged end of plunger acts as automatic stop). Valves are now OPEN and ready for flush sampling. When sampling is complete and with bushing still at finger tip tightness, pull plungers out so flow holes are outside O-Rings. Valves are now CLOSED. Bushings can then be tightened more for handling until ready to analyze.