Cuda's Customs Marine Boat Cup Holder is a high-quality, completely weatherproof, universal clamp-on mount cup holder. Its universal clamping system mounts onto your boat's round or square pipework. Once installed, it rotates 360 when pushed around the pipe, but it will not migrate down, unless forced. The cup holder fits 20- and 30-oz. tumbler cups or a can with or without a foam insulator. The plastic construction of Cuda's Customs cup holder has been stabilized to resist saltwater, UV damage, harsh outdoor elements, and abuse. Comes with slot for pliers. Made in USA. Universal clamp-on mount cup holder Fits boat's round or square pipework Rotates 360 when pushed around pipe Fits cans and 20- to 30-oz. cups Stabilized, highly durable plastic