NS 20mm Crimp Caps, PTFE/Butyl Rubber Septa 20mm Aluminum Pressure Release Crimp Cap (silver), 8mm hole, with Clear PTFE/Gray Butyl Rubber Septum, pk.100 Part Number: TF-C4020-39A Part Number: TF-C4020-43AP Cap Aluminum Vial at Thomas Scientific Cap Aluminum Vial found in: Cap,aluminum for 1 mL vials,11mm,1000/pk, Standard Aluminum Seals, Aluminum Seals, 11 mm Crimp Top Aluminum (Silver) Cap with.. sample vials for temperatures up to 210 C. Low background Chromtech : Autosampler Vials: : Chr