... good service 4.CNC Maching Detail information for aluminum extension ladder Aluminum Alloy 6063 6005 6061Certificate: ISO9001/ISO14001, OHSAS ... bending, milling, welding, fabrication etc.Packing: aluminum extension ladder wrapped in plastic film, carton box, wooden crates or as ... one of leading manufacturer in Fujian, China, specialized in R & D, marketing and production of various aluminum profile, ...