Give your boat that hi-tech look with Birdsalla's New Clamp-On Rod Holders

Out Side Diameter Measurement Guide, Click on more pics below for a full instructions on how to measure

Note: To determine the outside diameter. Measure the circumference. A simple and accurate way of doing this, is to take a piece of string and wrap it around your pipe. Measure the string length and divide the length by 3.14 = Out Side Diameter

3/4" Pipe = 1-1/16" O.D.

1" Pipe = 1 5/16"O.D.

1 1/4 Pipe = 1 5/8" O.D.

1 1/2 Pipe = 1 7/8" O.D