decorative ceiling diffusers part , air directional ceiling diffusers part, air ceiling diffuser part Material: aluminum Air ceiling diffuser,air directional ceiling diffusers ... 105,125,155,205,255,305,355,405mmProduct Specification:1) Used for ceiling or sidewall application2) All aluminum construction3) White powder ... .hongruihardware.cn Air ceiling diffuser,air directional ceiling diffusers part