... ISO 3834-3, ISO9001:2008 3.Benz's supplier seat backrest for train AL-00053 Materialiron or other metal meterialServiceOEM, ODMQualityISO9000 ... samples Meterial: Steel, stainless steel, carbon steel, aluminum, zinc, brass, plastic etc.Making process: Stamping, deep drawing, bending, punching, threading, welding ... relationship with your company in the near future. seat backrest for train AL-00053