JR Products Polar White Round Lockable Electrical Hatch Access Door 541-B-2-A 19-0201

It is a replacement for a round access door up to 4-1/2 inch diameter and accepts up to 50 ampere cord. Back is not included. It measures 3-1/2 inch cut-out dimension, 5-1/8 inch outside dimension and 2-3/8 inch collar depth. It features a snap-lock.