Attention - TOPOWN portable air conditioner hose has a diameter of 15cm/5.9 inches. Please measure your hose before purchasing. Our portable air conditioner hose is counterclockwise. Make sure the connector rotation direction is counterclockwise. If you have any questions, please contact us. (Due to different production batches, the hose diameter may have an error of 1-2mm, but it will not affect normal use) New 2nd generation PP material: Most portable air conditioner exhaust hoses on the market are made of ordinary PVC, which is easily damaged and deformed at high temperatures. TOPOWN air conditioner hose is made of environmentally friendly polypropylene, which can withstand temperatures from -20°C to 70°C. In addition, an additional steel spring is built into the air conditioner hose to make it more robust and not easy to deform, ensuring a longer service life. Adjustable - Our portable air conditioner hose is 79 inches / 2 meters long, which can shrink to 15 inches / 37 cm for easy storage. Thanks to the built-in steel spring, the portable air conditioner tube can be twisted and retracted at will without breaking or deforming. You can extend the exhaust hose to the desired length to adapt to different height windows and exhaust ports. If you need a shorter hose, please choose another 1.5m hose. High Compatibility - TOPONW portable air conditioner exhaust hose is suitable for most portable air conditioners on the market. In addition, it is also suitable for window sealing kit. It can effectively reduce energy consumption and save on electricity costs.