... & low price. 2. OEM service metal spare parts, Our investment casting process:1) Enhancing casting parts dimensional accuracy, decreasing the surface roughness, minimizing ... grades.2) Producing thin wall thickness, Small and lightweight parts, and parts with fine pattern,letters, grooves or curve holes.3) Integrating ... °.Castings Surface Roughness: Ra3.2~Ra12.5Small orders accepted metal spare parts