Flush Mount Combo Drink Holders feature a dual-purpose design which allows the use of beverage cans with or without insulated can wraps, as well as most standard size bottles. Integral drain fitting allows water to be drained directly into the bilge with the use of 1/4" tubing (not included). Requires a 3-3/4" diameter hole for installation. Available in black or white (or gray by special order). Constructed of impact resistant injection molded ABS.