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 directly to the exhaust hose and can be easily installed on the back of the portable air conditioner. Enhance Cooling: 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. Built to last and provide long-term use. Model: Round Diameter: 15 cm Material: Plastic Color: Gray White Package Contents: 1 x Interface Note: Light and screen display differences may cause slight variations in color compared to the actual item. Measurement may vary by +/- 1-3 cm.