Boat cup holder made of ABS plastic. The cup holder clip features anti-slip rubber for a strong grip. Mounts to rail with an adjustable knob that keeps the cup holder securely in place, ensuring drinks stay stable and do not spill. Easy to install—simply clamp and go, no tools, drilling, or assembly required, and no damage to the boat. Attaches to boat aluminum rails, poles, or bimini top rails. This drink holder is simple, durable, and practical, designed to hold various sizes of bottles and cups. The adjustable clamp allows rotation and can be mounted on horizontal, slanted, or vertical poles, enabling installation at different angles. Anti-slip rubber lining helps keep items secure and prevents spills. Suitable for pontoon boats, bass boats, jon boats, jet boats, yachts, kayaks, and more. Universal design allows mounting on any compatible rail. The interior space can also store small items such as sunscreen, pliers, hand wipes, lures, and other accessories. Color: Black. Material: ABS. Package includes: 2 x cup holders. Note: Light reflection and display differences may cause slight variations in color. Measurement error allowance: +/- 1-3 cm.