API KH1BP4 Black Mounting Clamps for Truck Caps / Camper Shells (Set of 4) Set of 4 clamps designed to mount truck caps on many pick-up truck models Constructed of tempered aluminum with attractive black semi-gloss powder coated finish Complete installation guide A = 1 1/8" B = 1 5/8" C = 0" - 1 3/8" (See technical drawing above) Made in the USA