Polypropylene Screw Thread Hole Caps with Septa for Chromatography Vials

Polypropylene Screw Thread Caps for Chromatography Vials are supplied with a variety of septa already inserted. Caps with PTFE/Silicone/PTFE Septa are good for multiple injections. These septa have PTFE resistance until punctured, then the septa will have silicone compatibility with PTFE/Silicone Septa resist coring and provide great resealability. Caps with PTFE/Red Rubber Septa are economical and the PTFE facing provides a good barrier from product contact.