Caps, Screw Top, with Natural Silicone Rubber / Natural PTFE Septa, fitted in knurled polypropylene, White Caps. For use with 24-414mm threaded EPA Style vials. ND24 threads. BASIK Brand. 100/PK.
Septa is 3.18mm (0.125") thick and can be used as an autosampler vial cap or for long term storage with any 30, 40 or 60 EPA Style vial that has 40-414 threads.
Cap has a 12.5mm top hole.