MSA Gas Detection Maintenance Kit is designed for ALTAIR 5X multi-gas detector. Length 2 ", Width 1-3/16", Height 1-1/2". For Use With Mfr. No. 10107602, 10107603, 10110443, 10110444, 10110445, 10110446, 10110488, 10110489. Includes Filters, O-ring, Screws.