Our custom rod holder is a clamp-on straight shot vertical mount rod holder consisting of 2 clamp-on holders and a rod holder insert. The holders, excluding rod holder sleeve, are made of high quality UV protected marine grade starboard and the rod holder insert is tough and durable plastic sleeve. All this and no moving parts makes these rod holders extremely durable and long lasting.
They install in minutes without drilling any holes in your boat, are adjustable after installation, and will rotate around pipe without damaging the pipe beneath. The rod holder sleeve is an extremely tight fit, but can also be rotated within holder to any position. The rod holder sleeve has tuliped lip and a cutout for spinning reels. Mount to casting and polling platforms or any upright vertical pipe. Mounting hardware included. 
They can withstand a lot of bouncing, bucking, and pounding and still will not move up and down on the pipe they are mounted on.
 Each holder is a precise custom fit for each aluminum or stainless pipe size variation.
Click here for printable ruler.
Included with your custom holder is the rod holder sleeve, 4 stainless steel allen screws, and the allen wrench for installation.
You can use calipers or a tape measure to get the outside diameter (OD), use a flexible tailors ruler to measure your pipes circumference, or you can print out our custom ruler and wrap it around the pipe you will be mounting your drink holder on.  
Dimensions:
Rod holder sleeve is 11 1/2 inches tall.
You need 1 inch clearance for the back C half of holder for those tight spaces
Pipe size chart.

$34.95