Caps, Screw Top, Solid, with Red Butyl Rubber / Grey PTFE Liner, fitted in knurled polypropylene, Black Caps. For use with ND18 thread, storage Vials or Bottles. MicroSolv Brand. 100/PK.
Butyl Rubber / PTFE Liner is 55⁰ Shore A (hardness) and is 1.6mm thick. Cap can be used for use with Storage Vials or Bottles with 18-400mm screw threads.