Single Drink Holder sized for canned drinks with insulated sleeves. I.D. 3.625” Overall Height 4.1”. Order to fit specific tubing size. Designed to be easily moved to different locations on the boat and stored below to avoid theft. Rotate clockwise to snap to tube and counter clockwise to remove. Designed primarily for mounting to angled tubes on the boat. As there is no mechanical clamping hardware supplied this unit is not suited for steeply angled or horizontal tubes.