... .different surface treatment, eg:anodized 3.Welcome to OEM. led light tube led light tube 's specificatin: SizeDIA 30mm*L500mmMaterialaluminum alloy 6060,6061,6063 ... treatmentmill finish,anodized sliver ,anodized bronze, etc.Application LED light,LED street light,cap-lamp,down light etc. Asage and advantage:A. Compression resistance,cauterization ...