API KH1P4-LDTT150P Mounting Clamps & Topper Tape&reg; for Truck Caps / Camper Shells (Set of 4) Set of 4 clamps & 1 roll of Topper Tape designed to mount truck caps on many pick-up truck models Constructed of tempered aluminum with a Mill 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