... service 4.CNC Maching Detail information for aluminum extension ladder Aluminum Alloy 6063 6005 6061Certificate: ISO9001/ISO14001, ... , milling, welding, fabrication etc.Packing: aluminum extension ladder wrapped in plastic film, carton box, wooden crates or ... energy, LED, machinery, advertisement, transport, auto part, exhibit shelf, telecom etc4. Machining service: precise cutting, de-burr, drill ...