JR Products Polar 6-7/8"RO White Lockable Multi-Purpose Hatch Access Door w/o Back 21102-A 92-9867

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