SPLIT VENT TRAP During split injection mode, more than 99% of your sample is vented to the atmosphere. The Split Vent Trap contains 1200 milligrams of pure activated charcoal which captures these volatile contaminants venting from split/splitless injectors. The Split Vent Trap consists of the inner glass adsorbent tube with nickel plated end fittings, clear plastic protective outer sleeve and 1/8" tube fittings. Each trap comes with three replacement tubes. High capacity - 1200mg of activated charcoal Protect your health and the health of your coworkers Three replacement cartridges included Hot tip: Carrier Gas Contaminants Can Lead To Gc Column Degradation, Causing Interference With Your Chromatography Such As Decreased Sensitivity And Increased Baseline Noise