Tool threestep assembly for a leakproof connection. This coupler is designed for safety and reliability, making it ideal for portable AC hose applications. Broad compatibility for diverse airflow needs. It enables a seamless connection across various systems that require airflow management, improving overall flexibility. Optimized exhaust performance. The design reduces airflow resistance and uses a flowguiding structure to support stable temperature regulation, enabling faster exhaust and improved comfort. Durable, reliable construction. Made from density material with a singlepiece molding, it provides deformation resistance and longlasting stability while withstanding pressure and wear. Use scenario: In a home or office, connect a portable air conditioner hose to a window exhaust kit to vent hot air efficiently and maintain comfort. Use scenario: In a workshop, garage, or tent, link temporary ventilation hoses for effective cooling or air exchange where a secure, leakproof fit is critical. Use scenario: As a replacement coupler in a small ducted ventilation system, delivering dependable performance under regular operation and wear.