Car Seat Rise Lift Spacer Set Can Make Your seats more comfortable ! The items working for Flat Seat Bracket or 45-degree Seat Bracket ! Compatible for Most of car seats (Flat bracket). 1. Size : Seat + 3.0 CM (1.2" inch) 2. Material : 6061 Aluminium+Steel !! 3. Fits Car/Truck Driver/Passenger Seats !! 4. Packing : 2Pcs +3cm(1.2"inch) Seat rise Block Set. 5. Install : Car Seat back Bracket or Front Bracket of Seats . 5.1. Loosen the original seats Bolts. 5.2. Put the rise block under the seat bracket. 5.3. Use tools to tighten the original Seat Bolts. 5.4. Fix the Rise Blocks By Tools 5.5. Use our Bolts to fix the seat bracket onto the rise blocks. 5.6. Tighten our Bolts ,Install End .