The World's Number One Car Fire Extinguisher Bracket! - Adjustable-width design that either clamps onto the seat rails or bolts onto seat mount points. See installation videos on listing for mounting compatibility. Compatible with the cradles supplied with H3R HG250, Amerex B417T or B385TS, Kidde 408-466727, FA110 or FA5G, or any 2 - 2.5lbs extinguishers with a supplied cradle with hole spacing of 4-¼”, 4-⅝” or 5” (108mm, 117mm or 127mm) center to center. Easy installation in around 15 minutes without drilling holes that places extinguisher out of the way, but within easy reach Constructed from high strength A572 high grade 50 steel with durable finish and supplied with stainless steel bolts and Allen Keys NOTE - Fitment depends on specific seat rail or bolt spacing. Refer to installation manual on listing for guidance. EXTINGUISHER NOT INCLUDED