The size of aluminum depends on the tonnage of the extruder. A simple way to distinguish them is to look at the cross-sectional size of aluminum. Small pieces of materials generally have a transverse dimension of less than 40MM, that is, products such as line pressing. If it is greater than 40MM, it belongs to Chinese timber, such as edge sealing, hook, light enterprise and so on. Building materials are not really big materials, because there are no super-large cross-section products. Even curtain wall series products can be produced by an extruder with a capacity of 1800 tons, and 1800 tons is a relatively large model in the middle machine. Large, medium and small materials have nothing to do with length, thickness and weight. I hope I can help you.