Good material: The vent hose connection is made of high-quality ABS material, which does not deform and also has excellent durability for long operating hours. Fixed connection: Ensures a tight connection without leakage, the portable air conditioning hose coupling allows good and efficient working effects. Easy installation: The air conditioning hose coupling allows screws both clockwise and counterclockwise. The coupling simplifies installation for left- and right-handed people. Best fit: The round hose connection for air conditioners with the size 5.9 inches is largely compatible with various air conditioners, which is very practical. Quick heat release: This air conditioning hose adapter can connect the hose firmly to the air conditioner to largely promote fast heat dissipation.