502270356. Microsolv Technology Corporation Caps, Headspace, Crimp Top, with Translucent Silicone Rubber / Natural PTFE, High Purity Septa, fitted in Aluminum, Silver Pressure Relief Caps with 8mm center holes. For use with 20mm Crimp Top Headspace Vials. 100/PK. Supplier: Microsolv Technology Corporation 95025092S.