We are manufacture,not the trading company.We are the source.1. Material: Aluminum 6063, Al6061 is also available. 2. Usuage: Aluminum Housing heat sink for LED light. 3. Surface treatment: Mill finished, anodizing, powder coating, brushing, polishing. etc. 4. Color available: White, black, silver, green, red. etc. 5. Punching, drilling holes, cutting, deep-processing. etc. 6. Technical information can be required by customer. 7. Package: As customer's requests.