Jensen 530924 Simplicity Frameless Medicine Cabinet, Single Door, Recessed Mount, 24-Inch by 30-Inch Mounting: Recessed Overall Size: 24-Inch x 30-Inch x 4-7/8-Inch Wall Opening: 21-1/2-Inch x 27-1/2-Inch x 3-1/2-Inch Steel construction 2 adjustable glass shelves