This hatch can be used for a variety of applications or anyplace you will need a locking compartment. Constructed with no back and a 1-1/8" collar. Durable plastic is UV resistant for a long life and resists fading, discoloring, and wear caused by road salts and acids. Can be painted to match any exterior with no preparation. Cut-out: 6-7/8"H x 6-3/8"W. Outside: 8-1/2"H x 8"W. Priced each.