... environment area, such as hospital, laboratory, howff, bus, train, broadcasting studio.Specifications:Structure: High elastic wire, aluminum ... 8, 10, 12, 14, 16 inchesStandard Length: 10MTemperate range: -30 degree to + 200degreeAir Velocity: 28m/sWorking Pressure: 250mmAqZhaoqing Grandaire Air ... years and is specialized in manufacturing a wide range of diffusers and grilles for A/C industry ...