Our patented vial and cap design incorporates pressure-relief Vials, 20mm Aluminum Crimp Cap, Plain center hole, Silicone/PTFE . Cap and Septa Only, No Vial. Cap: 20mm Aluminum Crimp Cap & Septa, Plain center hole, Septa: Silicone/PTFE, 45° shore A, 3.2mm, Package Size: 100/pk. Glass Vials - Clear Screw Vials With Matching Caps Wholesale