The Kirkey Racing Aluminum SFI 39.2 Certified Containment Seat is designed for Sprint Cars, North East Modifieds, Sportsman, Small Block Modifieds. Smaller sizes fit Midgets and 600 Micros. Six (6) sizes available, (14", 14-1/2", 15", 15-1/2", 16", 17"). First Aluminum Sprint Seat to pass SFI 39.2 certification. 10 degree layback. Will fit all early style Sprint Chassis. Designed to accommodate all head and neck restraints. Constructed from TIG welded .080" 5052 grade aluminum. Additional MIG welding adds strength. Contoured elongated bottom for added thigh and hip support. Right side leg extension built in, left side cut back for easy entry, exit. Unique design allows up to 2" of energy absorbing padding on bottom. Rib and reinforced shoulder supports have extra 1/2" energy absorbing padding directly on seat. Unique shoulder support cover design allows extra 1" shoulder width adjustment. Vertical and lateral adjustable head restraint uses molded high density energy absorbing impact pads to eliminate upholstery on head restraint. Head restraint can also rotate down for additional peripheral vision. Billet aluminum connector brackets for easy head adjustment. Left side of head restraint angled and shortened to allow easy entry, exit. Lap and sub belt openings have molded rubber grommets to eliminate belt wear. Designed to accommodate all seat belt systems. Seat passes SFI 39.2 Certification, eliminating need to buy new seat if your sanctioning body upgrades current rules to SFI Certification. Easily removable cover has additional 3/4" energy absorbing padding for extra comfort and protection. Black tweed, (cloth) cover. Quilted cover comes fully padded with 1/2" energy absorbing padding. Unique shoulder cover design allows up to an additional 1" of shoulder width adjustment. Cover double stitched around all belt openings and high stress areas. Easy removal for cleaning.