Package include: You will receive 5.9 inch 1 pc round AC hose extension, and 1 Pc round connector, fits 5.9" Hoses and 5.9" diameter exhaust hose. Compatibility Warning: Before purchasing, please carefully check the inner and outer diameters of the product and verify the exact size of your interface. Parts Window Adapter: Portable A/C air conditioner exhaust hose coupling for clockwise & counter clockwise threads AC hose coupler coupling extension, normal thread direction design, compatible with 5.9" diameter hose. Premium Material: Portable AC exhaust hose coupler is made of quality plastic, reliable, strong and not easy to damage, flexible structure, hard plastics have certain heat resistance and can provide good support, and can be used for a long time. Easy install: There is no need to use professional tools for installation, you just need to screw the connector into the hose that needs to be connected, and then the connection will be tight, tight fit with the air conditioning unit pipe, there will be no leakage, save energy consumption, environmental protection and high efficiency. Warm Tips: If you are not satisfied for any reason, just return for a refund of your purchase price; we promise 24 hours customer support, please feel free to contact us for any product&order problem.