Its overall dimension is 50mm x 50mm, also one of the square extrusions. 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 4.3mm, the depth of groove is 10.7mm. And the weight per meter of M346 is 1.78kg, the maximum length that can be produced is 6 meters. The product can be processed according to customer requirements, and can be reused for many times. A variety of surface treatment methods are available.