Caps, Headspace, Screw Top, with White Silicone Rubber / Blue PTFE Septa, fitted in Steel, Magnetic, Silver Caps with 8mm center holes. For use with 18mm Precision Thread Headspace Vials. BASIK Brand. 1000/CS.
Silicone Rubber / PTFE Septa has durometer of 50⁰ Shore A (hardness) and is 1.5mm thick. Cap has ND18 Screw Threads. Click HERE for smaller pack quantities.
Economical and low cost for budget minded laboratories.