aluminum air diffuser round ceiling diffuser with damper hvac

aluminum air diffuser round ceiling diffuser with damper hvac 1)The circular design guarantees an uniform radial discharge in supply air applications. 2)They can be used both for supply and return applications. 3)They are suitable for using in rooms with heights up to 4m(A,B,C designs), 6m(D design). 8M9H design) 4)Material: They are made of aluminum sheet. 5)Accessories:damper(butterfly damper in plastic or steel manual control;radial-shape damper screw sontrol.) 6)Mounting