The connector is used for connecting the hose exhaust hose and window kit plate, suitable for all portable air conditioning and exhaust hoses with an o-utlet diameter of 150mm (6 inches). Three types of flat mouth, square interface and round interface for your choice. Features: Made of high-quality abs material, d-urable and practical to use. Suitable for all portable air conditioning and exhaust hoses with an o-utlet diameter of 150mm (6 inches). For connecting the exhaust hose and window kit plate. It perfectly fits for the hose of air conditioner. Three types of flat mouth, square interface and round interface for your choice. Specifications: Material: ABS Type: Flat mouth, Square interface, Round interface (optional) Inside Diameter: 150mm / 5.91in Package Weight: Flat mouth: 150g / 5.29ounces Square interface: 100g / 3.53ounces Round interface: 50g / 1.76ounces Package Size: Flat mouth: 220 * 155 * 138mm / 8.66 * 6.1 * 5.43in Square interface: 180 * 150 * 63mm / 7.09 * 5.91 * 2.48in Round interface: 155 * 155 * 43mm / 6.1 * 6.1 * 1.69in Packing List: 1 * Exhaust Duct Interface