Boat cup holder made of ABS plastic. The cup holder features anti-slip rubber grips for strong hold, securely mounting to boat rails. An adjustable knob ensures a stable and secure fit on the rail, allowing you to place drinks in the holder without worry of spills. Easy to installsimply clamp and go, no tools, drilling, or assembly required, preventing damage to the boat. Mounts to aluminum rails, poles, or bimini top rails. This drink holder is simple, durable, and practical, designed to hold various bottle sizes. The adjustable clamp allows rotation and can be installed on horizontal, vertical, or angled poles. Anti-slip rubber lining keeps the holder fixed and helps prevent drinks from spilling or falling. Compatible with pontoon boats, bass boats, jon boats, jet boats, yachts, kayaks, and more. Holds water bottles, coffee cups, beer cans, and similar drink containers. Can be moved and repositioned on any rail as needed. Universal design with interior space for storing small items such as sunscreen, pliers, hand wipes, lures, and other accessories. Color: Black. Material: ABS. Package includes: 2 x cup holders. Item shown only; other items not included. Note: Lighting and display differences may cause slight color variation. Measurement may vary by 1-3 cm.