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These hollow piston rods are used for all types of adjustable shock absorbers for autos and motorcycles. To meet customer specifications and special requirements, we make hollow piston rods utilizing different processing methods based on different processing conditions. Each hollow piston rod features a chrome-plated surface ranging from 10um to 30um in thickness, and a surface roughness ranging fromRmax0.6um to Rmax0.2um. Passing various precision tests, our products feature high tensile strength and fatigue limits, ensuring customer satisfaction.