JG Finneran 8-425 mm White Open Hole Polypropylene Closure, Red PTFE/Silicone Septa, 0.050", 10 x 100 pc/PAK

Preassembled Screw Thread Open Hole Closure and Septa (8-425mm) - Choose the preassembled caps with septa best suited for your application. The patented TopHat™ septa and closure was designed to provide a positive physical lock to assure that preassembled components arrive intact.