Prepare your semi truck or trailer to be Ready for the Road Ahead , with the PARR 4" x 8" CDX Grade Plywood that acts as a versatile repair piece for vehicles and trailers. Thanks to its moisture-resistant design that can be used in all types of climates, this replacement board is the ideal option to repair damaged trailer floors, walls, or roofs. Engineered with high-quality materials to ensure long-lasting durability and reliability. FleetPride is your First Click in Heavy Duty .