This part connects your hose to the back of your AC unit. This part does NOT come with installation instructions. This original Hisense Air Conditioner AC Exhaust Hose Connector originally shipped with the following Hisense devices: AP0721CR1W, AP1021HR1GD This is a true Hisense part! This item is NEW! Don't see your model number? Send us a message as we are happy to help!