GC and GCMS Three Filter Installation Kit w/ Electronic Inidcator. Includes (1) 3 position base plate with 1/8” Stainless Steel inlet fittings and M Type outlet fittings, (1) Oxygen/Moisture/Hydrocarbon Trap, (2) Hydrocarbon/Moisture Traps, (1) Electronic Indicator Device and (1) Universal Ring Nut Mounting Clip