... . 2.Fabricate Full Range of Metal Materials. Item zinc alloy o ringMaterialStainless Steel, Cold Rolled Steel, Aluminum, Brass, ... Chrome Free Zinc Plating and Electro-Painting,zinc alloy o ring.2D&3D Design1. 3 designers in house.2. AI, ... popping Precision GrindingReel-to-Reel PlatingMetal Finishing ServicesAssemblyTumbling/Deburringzinc alloy o ringQuality Control1.ISO approved.2.Inspection at site ...