SeaLux Marine WHITE Boat Plastic Cup Drink Can Holders with Drain for Boat Marine Rv Universal (4 pcs set) SeaLux Marine WHITE Boat Plastic Cup Drink Can Holders with Drain for Boat Marine Rv Universal (4 pcs set) Dimensions: 3-1/2" H - 3 1/2"ID, 4 1/8" OD, with flange Install almost anywhere on boat, game table, sofa, cars and RV. come with dia. 3/8" drain holes in the bottom to keep moisture away Install almost anywhere; table, counter top, dashboard, seatback, etc. No Mounting Screws Required Smooth Finish For Easy Clean Up