CNC Turning and Milling LED lighting shell They parts we do are for the LED light installation. They are machined first in CNC turning machine,then in CNC milling machine. After all machining procedure,anodized with silver bright colour. Material: Aluminum 6061 Size: From Dia 2 inches to Dia 8 inches. Height From 2 inches to 8 inches Surface treatment: Anodizing. If you have an interest in these CNC turning and milling LED lighting shell. Please feel free to contact us.