Septa for short thread screw cap, ND9, red rubber/PTFE beige, 1000. VWR® Autosampler Vials, Inserts and Closures. Septum. Hardness. °shore. Thickness. (mm). Cat. No. Pack of. Case of. 9mm Open Top Cap, 6mm hole. Black. Polypropylene. Ivory PTFE/Red Rubber. Crimp cap | Sigma-Aldrich. Results 1 – 30 of 31 Crimp seals (magnetic) with PTFE