... 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 ... , such as doors, windows, fence, screen, curtain wall, handrail, partition, wardrobe, greenhouse and sunroom, etc. 2 Doors and ...