42/60/75/90mm Air Diesel Heater Duct Hose Pipe Air Vent Reducer Connector Outlet
Size: approx. 42mm (1.65"), 60mm (2.4"), 75mm (3"), 90mm (3.54"). （Note: This product of the air outlet have different sizes, especially the 42mm air outlet, which is relatively mini. For ducting connector.