Caps, Screw Top, Solid, with Red Butyl Rubber / Grey PTFE Liner, fitted in knurled polypropylene, White Caps. For use with 24-400mm threaded EPA Style vials. ND24 threads. MicroSolv Brand. 100/PK.
Liner is 55 Shore A, (Hardness), is 2.5mm thick and can be used for long term storage with any 30, 40 or 60 EPA Style vial that has 40-400 threads.
Solid top cap does not have an opening and is designed for storage or transportation.