ALUM Composition: Aluminum Special alloy 5754 - T5 treatment Technical features: Plate (thickness) 6mm PHD Composition: PHD 300 - (High Density Polyethylene) Technical features: Plate (thickness) 10mm Our thickest Skid Plates, for greater Strength and Durability; XRW Skid Plates are applied over the fairings, to make them easier...