SeaDog Flush Mount Combo Drink Holder w/Drain Fitting 

"Stamped 304 stainless. 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 the wrap if needed. Includes mounting gasket."

Hole: 3-5/8", A: 4-1/4", B: 3-5/8", C: 3-3/16", D: 3/4", E: 1/4"