Brocraft Boat T-TOP Rod Holder/Clamp-On Rod Holder - Silver Aluminum - Horizontal Mount - Fits 1" to 2" O.D. Pipe Made by marine grade T6 aluminum with CNC processing, Welding Polisded anodized silver Designed for clamp-1", 1-1/4", 1-1/2" , 1-3/4" , 2" O.D. Pipe Heavy duty construction,fo the heavier class trolling Rod holder Quick and easy installation