11 mm OD BTO high-temp center guide GC septa, PK50.

Maximum temperature 400 deg. C (330-350 deg. C for 17mm size). BTO is Bleed and Temperature Optimized for the most demanding GC and GC/MS applications. Septa BTO is formulated to extend low-bleed and outstanding mechanical properties or premium GC septa to the highest-temperature applications. 11 mm diameter, 3 mm thick. CenterGuide (TM) design requires less force for initial penetration, for a smoother feel. Septum life may be enhanced in some applications by minimizing tearing and coring. Packaged in Glass Jar: 2 in. H x 1-1/2in. W x 1-1/2in. D; Weight: 62.4 g