Surface can be plain, hot dip galvanized, zink plated, dacromet, geomet, black, painted, bitumenous coating or other specified by customers Material mainly 60si2mn and 60si2cr Hardness rockwell ranging from 44-48 Dimensions and chemical or mechanical properties exactly made as order Product name: / rail clip Materials: 60si2mn, 38si7, 60si2cr Protection: black, painting, dacro.