Rail Mount Bracket for Flagpole - Round - 7/8"-1"Round Rail Mount Bracket is for use on 7/8" and 1" tubing. Constructed of corrosion resistant UV stabilized injection molded nylon. Installs with two RH fasteners and nuts (included). Accommodates Sea-DogA(R) Round Flagpoles (328112-1 and 328114-1). Maximum speed 10 MPH. WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.