... for shock absorber, including powder metallurgy piston, rod guide, foot valve, PTFE band for piston, Du bearing ... ——Sizing——After treatment——Steam treatment——Oil impregnant——Packing——ShippingManufacturability1. Auto Mechanical Press: 50T, 100T, 140T2. Hydraulic Press: ... Carbonitriding quenching and high frequency quenching5. Ultrasonic clearing and auto deburring6. In-house tooling making: EDM, wire ...