Septum, Clear PTFE/Red Rubber. Closure Material, Aluminum. Closure Type, Crimp. Quantity, 200. Thickness (Metric), 1.0 mm. Autosampler Vials, Caps and Closures | Fisher Scientific Find autosampler vials, inserts, septa, and caps or convenient pre-packaged caps Snap/Crimp Caps are available in PTFE/ Red Rubber, PTFE/Silicone or Red