... quality Our history: we have specialized in Block moulding machine more than 20 years since 1989 ... paver, grassland brick, wall built brick, dam block, square ground brick, sidewalk brick and port brick ... of 16# manganese steel. After carburizing,the hardness can reach 60 degrees, lifespan can use ... wide range of blocks:PK block,Hollow block,Paving block,block use for plaza,block use for hill slope, curb ...