Fits all 5.9 inch to 6 inch hoses. Compatible with the back of many portable air conditioner units. Designed to fit down to 5.9 inch diameter exhaust hoses. Works with both clockwise and counterclockwise hoses. Easy to use: No tools required. No drilling needed. Connects to the exhaust hose and can be easily installed on the back of the portable air conditioner. Enhances cooling performance: This adapter allows the exhaust hose to be securely attached to your air conditioning unit, helping improve efficiency and cool your room more effectively. High quality: Made from durable plastic material. Designed for long-term use. Model: Round Diameter: 15 cm Material: Plastic Color: Gray White Package Contents: 1 x Interface Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations in the color of the item shown in the picture compared to the actual product. Measurement error allowance is +/- 1-3 cm.