... Alloy Feature: Good diffusing ability, good-looking shape Industrial Ceiling /Air Diffuser/ Air Conditioner Feature:Aluminum alloy material Straight leaf vane, Diversified ... or returnUse: For ceiling,side wall, sidewall, door, air conditioner application, in broadcast room, hospital, theater,guest room ... , their performances data are equivalent as well. Industrial Ceiling /Air Diffuser/ Air Conditioner