This is Kirkey's most advanced seat. it's designed for the professional or anybody that demands the ultimate in comfort and safetyFeatures: . 081 thick 5052 grade aluminum.TIG welded on the outside and MIG welded on the inside for added strength. Contoured sides support hips and thighs along complete side of seat.Seat bottom shaped at rear to support tailbone and lower back.Center leg support holds inner thighs under heavy cornering forces. Aluminum extrusion around perimeter of seat adds strength and safety.Edge of seat is stepped and extrusion is offset to outside so inside of seat is completely smooth. Seat back is double crossbroke for added strength and comfort. Front of seat is raised for thigh support. Headrest uses Kirkey's unique tubular rolled edge for added strength. Multi-position rubber edged lap belt openings for easy mounting.Double shoulder belt and sub belt openings are standard. Rib supports are reinforced with welded lightweight flared band. Strategically placed flared openings to lighten and strenghten the seat. Full covers or lightweight four piece modular covers are available. Extra thick, high density foam on rib support for added comfort and safety.Pit Stop USA offers Kirkey 56 Series Sprint Deluxe Upright Lightweight Seat - 17" - (Cover Sold Separately) 56700LW at low everyday prices. Be sure to check out all of our products from Kirkey Racing Fabrication including Kirkey 56LW Series Sprint Deluxe Seats and Kirkey Lightweight Sprint Deluxe Seats.