RubberShox® Universal Rubber Buffer for truck. It’s a Natural-Rubber Bump Stops Buffer for Truck or Recreational Vehicle (RV) front/rear Suspension System. A maintenance-free Nature Rubber Bump Stops suspension support. While soft initial contact and then increase in stiffness linearly. Offer a greater driving stability, heavy loading, off road performance and enhanced ride comfort while extending the operational lifespan of vehicular suspension.