11 mm Pre-Assembled Blue Aluminum Crimp Cap with PTFE/Red . 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. Labware Caps and Closures - Mercedes Scientific. Items 1 - 60 of 331 IBI 40110 5R 11 MM, Red, Aluminum, Crimp, Cap with PTFE