Sea Dog S-D-588065 Flush Mount Combo Drink Holder W/ Drain Dual purpose design allows use of beverage cans with or without insulated can wraps and also has rubber insert in bottom. Drain fitting allows water to be drained to bilge. Use 1/4" tubing for drain, secure with tie wrap if needed.Features: Includes Mounting Gasket; Made of Stainless Steel; Diameter of Lip: 4-3/8"; Hole Size for Installing: 3-11/16"; Inside Diameter: 3-9/16"; Depth: 3-3/16"; Impact resistant; Part NumberHole RequiredABCDE5880653-3/4"4-3/8"3-11/16"3-3/16"15/16"5/16"