1.Purchase aluminium bar. 2.Heat the aluminium bar, mould and extrusion machine, then extruse the profile.(YFA have 20 extrusion lines,you can check our Factory Show to view the detailed) 3.Heat the extrusion profiles to make it harden. 4.Clean it before powder coating or anodized surface treatment. 5.Powder coating.(YFA have 5 powder coating lines, you can check our Factory Show to view the detailed) 6.Packing.(YFA's standrad package: Pack with pearl wool and carton) 6.Delivery.