... of 55# Manganese steel, and tamper head is made of 16# manganese steel. After carburizing,the hardness can reach 60 degrees ... , lifespan can use over 100000 times. Standard brick mould can double-side use, lifespan can use over 120000 times ... of 300mm, this machine can make the wide range of blocks:PK block,Hollow block,Paving block,block use for plaza,block use for hill slope ...