Barometer Insert 2 3/4" is a standard clock insert with a plastic case, metal clips, plastic bezel & plastic crystal. This model has a gold plated bezel, invory dial and black numerals.The outside diameter is 69.9 mm (2-3/4"), fits hole 60.3 mm (2-3/8"), depth of case (without the bezel) 17.5 mm (11/16"). The movement is not supplied with the battery. *Please purchase an "'AA" battery.