• Pre-pierced for greater reliability
• Premium septum for autosamplers
• CenterGuide™ Marathond are pre-pierced for extremely reliable performance
• Up to 400 injections per septum
• Maximum temperature setting 400°C

The CRS Marathon septum typically achieves 400 injections without failure, when used with a rounded-tip (Agilent-style) needle and autosampler or needle guide. The CenterGuide versions of Marathon are pre-pierced to channel the needle through the same spot with each injection, which helps eliminate the common type of coring that occurs on the first injection. The Marathon septum is also ideal for standard manual-injection GC and GC-MS. Septa are 3mm thick, except Shimadzu-style plug septa. Septa are packaged in glass jars.