GC-Septa, 5 mm OD, Marathon low-bleed center guide, 25 pc/PAK

Long injection life, pre-pierced for minimal coring. Maximum temperature 350 deg. C. CRS Marathon (TM) septum typically achieves 400 injections without failure, when used with a rounded-tip (Agilent-style) needle and autosampler or needle guide. Marathon is ideal for standard manual-injection GC and GC/MS. 5 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