Provides an easy way to evacuate and tip-off NMR tubes without additional sealing to other glass apparatus. NMR sealing manifolds utilize Kontes® HI-VAC® valves and feature a BEVEL-SEAL™ threaded connection and a specially designed cap with an aluminum shield for heat deflection. All o-rings supplied are FKM. Valve plugs are Cat.No. 186-826501-0008. Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements.