Boat cup holder made of ABS plastic. The cup holder clip features anti-slip rubber pads for a strong grip. Mounts to rail with an adjustable knob that keeps the cup holder securely in place, allowing you to place drinks inside without worry of spills. The cup holders are easy to installsimply clamp and go, with no tools, assembly, or drilling required. They cause no damage to the boat and can be mounted on aluminum rails, poles, or bimini top rails. This boat drink holder is simple, durable, and practical. The adjustable clamp accommodates various bottle sizes and allows rotation. It can be installed on horizontal, slanted, or vertical poles at different angles. Anti-slip rubber inserts keep bottles secure and help prevent spills. Compatible with pontoon boats, bass boats, jon boats, and jet skis. The boat rail cup holder fits water bottles, coffee cups, beer cans, and similar drink containers. Easily mounts to boat rails and can be repositioned as needed. Suitable for use on yachts, pontoon boats, bass boats, jon boats, and kayaks. Universal drink holders feature an interior space that can store small items such as sunscreen, pliers, drinks, wipes, lures, and other accessories. Color: Black Material: ABS Package Contents: 2 x Cup Holders Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.