1. High quality: Composed of high quality cup holders and 15 LED lights, it is and -. This high- can easily replace plastic cup holders and stainless steel cup holders without LEDs. 2. Note: If the bulb does not work after wiring, please replace the positive and negative connections of the wires. Try again 3. Convenient installation: There is a double-sided tape ring under the flange. You can easily install it almost anywhere, such as desks, dashboards, countertops, and seat backs. It will not loosen, and it is equipped with a strong coaster to reduce noise. Prevent the beverage container from sliding 4. Drain hole: drink holder with drain cup includes a self-drain hole with hose barb, installation gasket and inner pad. This can be used to drain the liquid from the cup 5. Size: 15 LED steel cups with drain pipes, the height of the cup holder is 3-1/4 inches (about 8.6 cm); the top inner diameter is 3-1/2 inches; the top outer diameter. 4-1/4 inches and bottom diameter. 2-7/8 inches (approximately 7.6 cm), the hole needs to be 3-3/4 inches (approximately 9.5 cm) to 3-5/8 inches (approximately 9.5 cm) colour:Silver Material:stainless steel Package Contents: 2 x Boat Drink Holder Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.