ITEM NAME:Mounting Clamps Heavy Duty Long Reach for Pickup Truck Cap Topper Camper Shell Product Description Description: Features: - 2" throat Depth - Max Clamp Thickness 1 9/16" thick - Clamp is 1.125" wide - Designed for mounting truck caps with fiberglass or aluminum rails Specifications: Material: aluminum alloy Weight: 290g/pc Quantity: 1pc/4pcs Notes: 1. There may be slight size deviations due to manual measurement, different measuring methods and tools. 2. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. Included: 1/4 X Clamps.2" throat Depth. - Max Clamp Thickness 1 9/16" thick. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item. Warranty Service.