Easy to use: No tools required, no drilling required. It is connected to the drain pipe and can be easily installed on the portable air conditioner. Very simple and practical. Lightweight and convenient, easy to carry and store. Excellent Quality: Made of excellent plastic material, it is very durable and will not scratch or damage the window. Reduce hot air inlet: This interface can be connected to the exhaust pipe of the air conditioner to cool your room faster, making you feel comfortable. Eco-friendly and energy-saving. Suitable for: Suitable for air conditioning exhaust pipe about 15cm/5.91in. This air conditioning exhaust pipe exhaust pipe interface can be installed on portable air conditioner. It is a connector that can be installed with exhaust pipes with a diameter of about 15CM/5.91in. Advantages: A good air conditioning pipe joint could help reduce the energy consumption and a well-built exhaust ventilation system could save your electricity bills with an efficient cooling system.