Aluminum&Plastic Square Air Diffuser 1.it won't condensate 2.surface with offwhite 3.Size:400,450,500,600mm 4:Aluminum,ABS Aluminum&Plastic Square Air Diffuser1.it will not condensate2.surface with offwhite3.it's the best choice for the place where is sensitive to condensate water4.Size:400,450,500,600mm5.alumunim or plastic6.customized7.Damper for option8. different sizes available upon your ...