... 2.zinc plated 3.ISO9001-2008 2013 High quality Metal machine shaft cover (ISO9001-2008) Haiyan Hongtai Metal Products Co.,Ltd. Wecan produced by ... , galvanized sheet, stainless steel 304 ,brass2) surface treatment: Zinc , powder coat, hot-dip galvanized3) machining Process: Stamping , turning,tube bending, welding ...