Extruded magnesium alloy bars, profiles and tubes Our company is a professional manufacturer of magnesium extrusions in rods, bars, solid shapes, structural shapes, wires, tubes, hollow shapes and semi-hollow shapes. We are offered in a variety of standard alloys and forms as well as many special shapes tailored to a customer's particular requirements. Alloys available: zm21, az31b, az61a, az80a zk60a, we54a and we43a.