Polypropylene Stopcock with PTFE PlugFor ¼ to ⅜ in. I.D. TubingPolypropylene plastic stopcock body has Teflon® PTFE plug, washer and bright red handle. Plug is 3 way for vacuum draw, shut-off and vacuum releaseTaper fits on desiccator portUse on Desiccator Models: F42010, F42012, F42020, F42022, F42..