aijiren Tech™ Septa for 8-425 Screw Thread Caps are constructed of PTFE, PTFE/rubber, or PTFE/silicone to suit a variety of HPLC, GC and IC applications. Choose from aijiren Tech™, aijiren Tech™ National™, and aijiren Tech™ Chromacol™ brands. 9mm Wide Opening Amber Glass Screw Thread Vials aijiren Tech™