Features：

Versatile Mounting: 
2 1/8 inch clamp with anodized finish; includes rubber collars for 2 inch, 1 7/8-inch, and 1 1/2-inch sizes, ensuring perfect compatibility with Dolphin T-tops, Stryker T-Tops, Fishmaster T-tops and other standard boat round tubing diameters.
This cup holder is easy to install and features a unique adjustable design that allows it to be mounted on horizontal, vertical, or inclined round tubes, keeping the cup level at all times.

Dimensions: 
4 inches in height; 3 1/2-inch inner diameter; 4 1/4-inch outer diameter (including flange).
Self-draining Stainless Steel Cup Holder Bowl: Crafted from high-quality stainless steel with excellent corrosion resistance, making it suitable for marine environments with high salt-spray exposure.

Drainage Design: 
Features a self-draining recessed design to prevent water accumulation.

VERSATILE USE: 
Holds cans, bottles, and other standard-sized beverages, making it a practical addition to your boating experience.