Heng's Industries JRP 2103 Roof Vent Garnish for 2.5 Inch to 4.1 Inch Roof White, roof vent garnish for 2.5 inch to 4.1 inch roof thickness For a 1 inch to 2.5 inch roof, order part number 122882-06-01A Due to dimensional weight additional shipping fees appy Winnebago Industries part number 122882-07-01A