agriculture harrow disc blade 1.Material:Spring steel 65Mn 2. Diameter:10-32inch 3.Thickness:3-12mm 4.Hardness:38-48 agriculture harrow disc blade: Common Specifications of Discs DiameterHeight of bowThicknessMMINCHMMMM255101233051219333013253355143834101538~50343017573,44601838~603,448019573,45102044~633,4,553521633,4,55602260~854,5,65852375~904,5,66102475~954,5,66602686~1155,6,7,871028100~1305, ...