... plough disc, harrow disc, disc blade, plough blade, disc plough blade, disc harrow blade, plough disc blade, harrow disc blade ,notched disc blade, notched plough disc,, notched ... , agricultural disc,coulter blade, seeder disc, coulter,65Mn farm bladeMaterial: 65 Manganese Steel Hardness: 42to 48 HRCDisc Size: from 16" to 36 ...