The cotter pin is stainless steel, the other parts are hot-dip galvanized steel. CatalogNoDimensions( mm )Rated Failure Load( kN )Weight( kg )C1C2MhZ-718181660700.6 We are the manufacturer and exporter of Insulators, also supply to the goverment. Any question, please feel free to contact me ,you will be understand my products and techique. I am very glad to serve for you!