The Rock Solid Tow Guard is the effective way to reduce the costly damage that road debris can cause to your towed vehicle. Rock Solid Guards are made of exhaust heat resistant rubber. This new material is 3/8" thick vulcanized molded rubber that is impervious to extreme exhaust heat and won't melt or deform. The Rock Solid design allows air to flow through the vented flaps to allow flexibility and prevent heat build-up, but it's sturdy enough to stop rocks or small road debris. These Rock Solid Guards install on the hitch insert of most 2" and 2-1/2" receiver hitches and can be easily taken on and off. All mounting hardware is included. This Rock Solid Protective Guard consists of two 18"H x 34"L pieces that mount to the receiver hitch of your truck. Trim or eliminate strips to accommodate mufflers, hitches, or wiring. Mounting brackets are galvanized steel. Measuring Instructions: Measure from bumper to ground and subtract 4" to determine correct height. Vented flaps allow flexibility & prevent heat build-up Easily installed on the hitch insert of most 2"" & 2-1/2"" receiver hitches Two 18""H x 34""L pieces | Smart Solutions Rock Solid Tow Guard for Trucks, 18" x 34", 2 pieces