One of 80mm square extrusions, its overall dimension is 80mm x 80mm, also one of the basic shell scheme material. It can be used as upright and beam of the stand, it also can be called as post or pillar. Its material is 6063 aluminum. The wall thickness of profile is 2.1mm, it has eight system grooves, the width of each groove is 4.3m. And the weight per meter of M313 is 2.35kg, the maximum length that can be produced is 6 meters. This product can be processed according to customer requirements, and can be reused for many times. A variety of surface treatment methods are available.