... glass process complex shell process.2. Materials: stainless steel ,carbon steel ,alloy steel, heat resistant steel ,tool steel ,brass and aluminum ,according to DIN ,EN ... , ASTM, BS,JCSI.3. Piece numbers: small, medium and large series.4. Process: cast ... ,metallograph.7. Quality control: According to ISO 9001 2001 Stainless Steel Blind Base,Marine Hardware