Superior Performance, Improved Air Conditioner Efficiency: By connecting the exhaust hose, this window adapter effectively exhausts hot air outside, allowing the air conditioner to cool faster. It prevents the return of hot air, keeping the room cool and improving the air conditioner's efficiency. Compatible with Multiple Air Conditioner Models: This air conditioner exhaust hose coupler is compatible with air conditioners with a 150mm external thread and a 130mm internal thread. Easy to install, durable and reliable, ideal for home or office use. Effective Sealing, Keep Fresh: By connecting the exhaust hose to the window plate, this exhaust window hose connector effectively isolates the hot air from outside. It prevents hot air and insects from entering, keeping the room always cool. Durable ABS material, long service life: Made of high-quality ABS material, wear-resistant and oxidation-resistant. The adapter is durable, does not damage the window, and is suitable for long-term use.