1. MAKE SURE IT FITS Ensure the outer diameter of your original hose measures 15 cm edgetoedge, making it compatible with most portable air conditioners. Our AC exhaust vent features a counterclockwise thread direction. Verify this matches your AC unit before . 2. LENGTHADJUSTABLE HOSE The exhaust vent can be shortened to 40 cm (16 inches) or extended up to 200 cm (80 inches). It stretches and retracts effortlessly, allowing compact storage when not in use. 3. DURABLE CONSTRUCTION Made of reinforced polypropylene with an embedded quality steel ring, the hose offers heat resistance, wear resistance, and antiaging properties for extended durability. It withstands prolonged hot airflow and abrasion without leaks. 4. EASY INSTALLATION QUICK ASSEMBLY Simply extend the exhaust hose to match your existing hose, align both ends, and twist counterclockwise until it clicks securely into place.