APlusLift 4 Post Lift Stop Plates 2 Pieces Model:For HW 8S and HW 8SXLT Models Concrete Requirement 6" thick at 2 Post Lift Parts Concrete Requirement 6" thick at 3500 psi reinforced with fiberglass or steel (4" thick for vehicles 9000LB and below) Model TR 10C and TR 10CX AP 12SR Manual Style Overhead Overhead Column Installation Symmetric or Asymmetric Symmetric Arm Arrangement Both Front and Rear 3 Stage Assemblys Symmetric Lock Release Single Point Release Single Point Release Warranty 3 Years (36 months) 3 Years (36 months) Lifting Capacity 14 Warning: If you do not own our product and this part does not fit your equipment we do not accept returns