JR Products Black 3-1/2"RO Round Lockable Cable Hatch Access Door w/Back 541-3-A 19-0210

3-1/2 Inch Cutout Dimension, 5-1/8 Inch Height x 2-3/8 Inch Width. Vermin door accepts both 30 & 50A cord. It has snap-lock for added security. Strongest hinge on the market. Replaces any round hatch up to 4-1/2 Inch.