【Rear Suspension Lowering】Designed to lower leaf spring rear suspension and adjust vehicle ride height with a pair of aluminum lowering blocks for a cleaner stance. 【6061-T6 Extruded Aluminum】Made from lightweight aluminum extrusion for high strength, corrosion resistance and long-lasting performance without unnecessary suspension weight. 【2.5" Leaf Spring Compatibility】Designed for 2.5 inch wide leaf springs with 5 inch block length. Please measure your leaf spring width before ordering. 【Multiple Drop Heights Available】Choose from 0.5 to 4 inch lowering blocks to achieve different rear ride height requirements. 【Precision Alignment Design】Includes 9/16 inch center pin to help maintain axle alignment. Longer U-bolts are required and sold separately. Specification: Material：Aluminum Color：Silver Size: 3 Inch Design：2-1/2" wide+5" long+9/16" centering pin Package Includes: 1 x Leaf Spring Lowering Block Options explained: 050 = 1/2" thick 100 = 1" thick 150 = 1.5" thick 200 = 2" thick 300 = 3" thick 400 = 4" thick Note: 1.Please check the description to confirm the compatibility before purchasing 2.Professional installation is recommended 3.We maintain high standards of excellence and strive for customer satisfaction