Rancho Suspension Leaf Spring Block Kits were developed to fit for your specific application. They provide a quality solution for completing your suspension system for extra lift at a great value! The kits come in various sized to accommodate your desired lift and are sold in pairs with all necessary hardware ? auxiliary spring, two spacer blocks, a spacer block kit, carrier bearing spacer, 4 corrosion-resistant U-bolts and an axle vent. The block are made from black polyurethane construction and provide extra long service life.