... service 4.CNC Maching Detail information for aluminum extension ladder Aluminum Alloy 6063 6005 6061Certificate: ISO9001/ISO14001 ... stretch bending, milling, welding, fabrication etc.Packing: aluminum extension ladder wrapped in plastic film, carton box, wooden crates ... 1.Aluminum profile for construction, such as doors, windows, fence, screen, curtain wall, handrail, partition, wardrobe, greenhouse ...