Thetford 94328 Electrical Cord Hatch, manufactured by B&B Molders, is suitable for 30A and 50A cords, and has a round profile with an overall diameter of 4-5/8" and a depth of 2-3/8". It requires a 3-1/2" cutout in the installation location, and is finished in Polar White. This hatch is a suitable replacement for the B&B Cross Reference 370-2-A.