RD-A3 RD-A1 RD-P1 Product Name: Round Ceiling Diffuser Item code: D-R Material: Extruded Aluminum Alloy (the thickness is commonly 0.8mm-1.2mm, also can be customerized ) Surface Finish: Backed powder coated / Natural anodized Corlor: commonly white / other colors are available as per your requested Size: different sizes available upon your requested Standard SizeNeck SizeOveral Face Size100250150300200350230380250400300450350500380530450600 Price: best price will be quoted individually upon your requested size or special specification. Features: The product is formed by roll pressed and consists of two separate parts: removable inner core andoutframe. Its removable mechanism of the inner core allows easier set up and OBDcan be addedto adjust the air volume. Application: Ceiling downward projection type air distribution