The SynthwareTM Reaction Flask manufactured by Kemtech America Inc. comes with high vacuum valve with PTFE O-ring at tip and PTFE wiper for protection of Viton® O-ring on shaft.
Specification
Material: Borosilicate glass Valve size: 0-4 mm Sterility: Non-sterile Joint: ST/NS 24/40 Packaging: Pack of 1 Capacity: 250 mL