Lee's Clamp-On Rod Holder - Black Aluminum - Vertical Mount - Fits 1.900" O.D. Pipe [RA5004BK]Clamp On Rod Holder White Aluminum Vertical Mount Fits 1. 900 O. D. Pipe Color: Black Pipe Size:#4 Fits: 1. 900" O. D. Pipe Mount: Vertical JUST CLAMP THEM ON! Aluminum rod holders that are as beautiful as they are functional. With no hassle or wear and tear on your boat you can install these rod holders with only an Allen Wrench. No lengthy trips to the tower builder for custom installation at custom prices. Simply place the two halves of the clamp