1 Hole 75mm to 4 Holes 42mm Air Outlet Vent Cover Air Diesel Parking Heater Converter Specification: Condition: New Fitment: For most diesel heaters Color: Black Material: Plastic Size:as the picture shown 1 Hole 75mm to 4 Holes 42mm Package Included: 1x Vent Outlet converter Please check the size before placing an order to ensure it fits properly.