Replace your RV refrigerator's service vent door with 621156BK Plastic Radius Corner Side Vent from Norcold. This air intake corner side vent is black wrapped and compatible with Norcold refrigerators. It features radius corners with a screw cover provision and a cut-out dimension of 13-3/4" H x 21-1/2" W. The actual size of this vent door is 16-1/2" H x 24-1/2" W and the door size is 15" H x 22-5/8" W.