Sea-Dog Sea Dog Rail Mount Antenna Bracket Lever Type. Accepts any standard antenna with 1-14 threads (NOT recommended for whips over 8). Can be mounted on either 7/8 and 1 vertical or horizontal rails. Constructed of corrosion resistant injection molded nylon. Features of Sea-Dog 327148-1 Sea Dog Rail Mount Antenna Bracket Lever Type Corrosion Resistant Injection Molded Nylon Can be mounted on vertical and horizontal rails Designed for quick and simple installation Package Contents: Sea-Dog 327148-1 Sea Dog Rail Mount Antenna Bracket Lever Type Sea-Dog 327148-1: Sea Dog Rail Mount Antenna Bracket Lever Type