AA-Racks Mounting Clamp for Truck Cap, Camper Shell, Topper for a Short Bed Pickup Truck (Set of 4), (P-AC-02)Set of 4 quality P AC 02 truck cap clamps for short bed. Made with structural aluminum to ensure quality and strength For the specific size, please refer to list picture No. 2 for reference Size easily and fit firmly to your truck and cap NOT COMPATIBLE with trucks with Utility Track Systems. Consult us before placing the order if you are not sure about compatibility issues. Fits CHEVY: Silverado Sierra 1500, 2500, 3500. Silverado Sierra 07 with Cargo