Customized Power Transmission Products This is cover is made of casting iron and made by CNC profess. Black surface or hot dip galvanized surface. It is used in vehicle. Stanard:ISO9001:201,TS16949 We have over 20 years of experience in the casting+CNC industry. We have the necessary knowledge and experience required to meet the specific demands presented various applications. We provide custom steel parts with the strength and durability required to keep equipment performing at its highest level.Customized Power Transmission Products website:http://www.botmachinery.com/other-power-transmission-products/