Caps, Screw Top, with White Silicone Rubber / Natural PTFE Septa, fitted in "knurled", polypropylene, Black Caps. For use with 9-425mm thread, 12x32mm autosampler vials. BASIK Brand. 100/PK.
This is our most economical, lowest cost Screw Cap for Autosampler Vials.
Natural PTFE is as equally inert and durable as Red PTFE, but no dyes have been added. Click HERE for case quantities.