... Nozzle Diffuser(ball spout,ball jet diffuser) For the odium, airport, theater, museum supply air Neck: 50, 100, 150, 200mm Jet Nozzle Diffuser(ball spout,ball ... jet diffuser)The features of the ball jet diffuser FK-QP are long ... and angle without manual adjustment when season changes. Jet Nozzle Diffuser(ball spout,ball jet diffuser)