Fits all 5.9 inch - 6 inch hoses: Fits on the back of many portable air conditioner units. Fits down to 5.9 inch diameter exhaust hose. Fits both clockwise and counterclockwise hoses. Easy to use: No tools needed. No drilling. Connects to the exhaust hose and can be easily installed on the back of the portable air conditioner. Enhance cooling: This adapter can attach exhaust hose closely to your AC unit, allowing your air conditioning unit to operate more efficiently and cool your room faster. High quality: Made from plastic material. Durable and cost-effective, designed for long-term use. Model: Round Diameter: 15cm Material: Plastic Color: Gray white Package contents: 1 x Interface Only the above package content is included; other items are not. Note: Lighting and monitor differences may cause slight color variations. Measurement allows an error of +/- 1-3cm.