JR Products Polar White 5-7/8"RO Lockable Multi-Purpose Hatch Access Door E8102-A 95-8162

4-3/4 Inch Height x 5-7/8 Inch Width Cutout Dimension, 6-1/2 Inch Height x 7-1/8 Inch Width x 1-1/8 Inch Collar Depth. It comes with keylock for added security.