Blue Aluminum Crimp Cap with PTFE/Red Rubber Septa for sealing sample vials for temperatures up to 160°C. Recommend for storage and for multiple injection use. Fisherbrand 11 mm Autosampler Vial Crimp Caps with Septa . Fisherbrand™ 11 mm Autosampler Vial Crimp Caps with Septa, Aluminum Seal, 5.5 mm Hole.