GC septa, 12.7 mm (1/2'') OD, Marathon long-life, center guide, 24 pc/PAK

Long injection life, pre-pierced for minimal coring. Maximum temperature 350 deg. C (except in the 17mm size – please see specification details). CRS Marathon 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. CenterGuide design requires less force for initial penetration, for a smoother feel. Septum life may be enhanced in some applications by minimizing tearing and coring.