Extra Thick .375″ (9.52mm) Rubber Compound Construction. Helps Prevent Cargo From Shifting & Damaging Your Truck Bed. Custom Fit : No. Highly Compressed Rubber Resists Abrasions, Tears, Cracking and Fuel Spills. Universal – 60″ x 19.5″ and Fits Most Full Size Trucks without Trimming, still Some Trimming May Be Required. Mounting Hardware Included. Drilling Required for Installation.