Standard Universal RV Roof Vent (NON POWERED) w/ White Wedge Style Lid Heng's Industries Part # 71111A REMOVABLE SCREEN made from strong, fine mesh HANDLE Manual Crank Style ROUGH CUT-OUT OPENING DIMENSIONS (this is the hole you will need in your roof) 14 1/2” X 14 1/2” ROOF FLANGE Galvanized Steel with Mill Finish EXTERIOR MOUNTING FLANGE DIMENSIONS (sits on the top of your unit) 16 1/2” X 16 1/2” ****WARNING All Vent Metal Flanges are VERY SHARP use caution when touching WARNING ****