Nylon Flagpole Pennant Mounts & Stainless Clips - Set of 4 The Sea-Dog; Adjustable Rail Mount Flagpole is constructed of highly polished, heavy wall stainless steel tubing with an injection molded nylon rail mount bracket. The flag is attached to the flagpole using nylon adjustable flagpole clips in conjunction with stainless steel, spring wire, quick release clips which allows mounting flexibility for a variety of flag or pennant sizes. For use on either 7/8" or 1" tubing. Maximum speed 10 MPH.