This cup holder with drain is made of stainless steel which provides resistance from rust and corrosion. It is easily installed almost anywhere like on a table, counter top, dashboard, etc. Besides, it can be placed on your boat or RV to hold bottles and cups of appropriate sizes and to drain out the excess liquid content from the cup. The last but not least, it is an product which can replace plastic drop-in cup holders with ease. : Boat / Yacht / Truck / Car / Apartment / RV Height overall including drain fitting : 3-1/4 inch (82mm) Diameter overall lip outside : 4-1/4 inch (108mm) Diameter inside () : 3-5/8 inch (92mm) Diameter inside (small) : 2-13/16 inch (72mm) with: Car RV Boat Light and easy to install. Made of stainless steal, rust and corrosion resistant. Two stages to hold bottles and cups of different sizes and shapes. Colour: Silver Material: Stainless Steel Package Contents: 2 * Stainless Steel Cup Holder Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.