Custom 3D printed adapter that connects a portable air conditioners exhaust hose (that connects to a 143mm wide by 2mm deep opening) to a standard 6" round duct instead of the included window vent kit. Many times, garages or other shop may not have a window. If you are running 3D printers or laser engravers, you would normally have an exhaust system that you can connect to. Durable ASA material construction, precision printed in-house for a snug, secure fit that keeps hot air venting efficiently outside. Made to order — ships within a few business days.