Durable Components.?ǻUpgrade your rear suspension with Rough Country's Lift Block Kit. This 1.5" lift block is made of fiberglass reinforced nylon for superior strength and durability, and it will give you a 1.5-inch rear lift. In addition, our Lift Blocks will increase ground clearance while maintaining factory ride quality. Designed to improve your truck's weight distribution, they can extend the life of your suspension by reducing rear sag. With an installation time of 2-3 hours, Rough Country's Suspension Lift Blocks offer an inexpensive way to easily add lift to the rear suspension of your truck, jeep, or SUV.