• Adjustable to fits air outlet of Cassette AC that contains air outlet range between 50cm and 60cm in length. • Rotatable 360°, can be adjusted freely to change the air-conditioner wind direction. • Easy to install – no tools or drilling required, Easy to disassemble for cleaning. Convenient for both summer and winter to enjoy cool and warm air respectively. Pure and transparent wings, does not interrupt the remote control signal of the air conditioner.