https://alexnld.com/product/13cm-window-adaptor-tube-connector-portable-air-conditioner-spare-parts-flat-interface-adaptor-for-air-conditioner-exhaust-hose-kit-plate/?hilite="5 Inch Diameter 60 Inch Long Air Conditioner Exhaust Hose Tube Vent Hose Window Duct Flexible Tube"