Ace pressure tubes with plunger valves and thermowells 

Glass plunger valve has a 5 mm I.D. thermowell for a thermocouple wire or sheathed probe up to 1/8 in. (3.2 mm) diam. Overall length of plunger valve is 190mm. The thermowell length is 70mm. Plunger has a hole on the side that, when positioned in relation to the O-ring seal, allows tube to be open or closed to the atmosphere (i.e., pull to close, push to open). Complete item consists of tube, PTFE bushing with FETFE® O-ring, and plunger valve with thermowell.
CAUTION: This glassware is not guaranteed against breakage caused by pressure or vacuum. These tubes should never be used if scratched or otherwise damaged.