Sea Dog Removable Rail Mount ClampsSea Dog Removable Rail Mount Clamps are a great option for mounting a wide variety of items including fillet tables, solar panels, GPS, cell phone holders, cup holders, binocular racks, and more to your existing rails. These clamps are constructed of UV stabilized injection-molded nylon with stainless steel hardware and are designed to fit 3/4" and 1-1/4" tubing. Includes shims, thumb screws and all mounting hardware.Features: Injection molded nylon and stainless steel construction; Fits 3/4" and 1-1/4" tubing; Includes all mounting hardware; Dimensions: Part Number A B C D E Weight 327199-1 3/4", 1", 1-1/4" 3-7/8" 1-7/16" 2-1/2" 7/8" .32