... #,3.Hardness(1):Q4.Bonding agent:resin5.Reinforced net:two fiberglass netsBlack1220080(1)Generally,please chose reasonable hardness cut ... hard metal,like general steels,ferrous metal,aluminium,iron,angle iron,brass,bronze,carbon steel,casting,railway,non-ferrous ... dust respirators5.Observe safety recommendationsPacking:1.During transport,please load and unload carufully to prevent the crack and shock ...