Cylinder (filter shell, filter cartridge) Material: 6 series aluminum alloy; features: the product requires no processing and is hexagonal at the end -Application: applied as filter shell of automobile -Client Problem: once forging forming is required by foreign customers. But most domestic manufacturers can hardly meet the requirements since welding is applied. -QH Solution: QH realizes direct extrusion forming by means of forging process, which improves the production efficiency and reduces the cost. -Benefits: low material consumption and high production efficiency