I built this for a 35 foot sailboat out of 1/2 marine plywood, fiberglassed over on the inside and then floated in epoxy over the fiberglass one side at a time. The finish is extremely smooth. There is a recessed drain hole with a plastic thru-hull attached The boat had to be disposed of and this freezer box was never used. Insulation is polyurethane foam 3” top, bottom, front and back. 2” on sides and 3 1/2 on lid. Exterior dimensions H-25” (without the legs) x W-20 1/2”x L-36”. Inside dimensions of fridge space H-21”x W-15”x L-16 3/4 Freezer dimensions (for cold plate or box) H-9 1/4”x W-15”x L-12” This fridge/freezer box will need a compressor and cold plate/box which can be purchased from any marine store or refrigeration supplier.