Spring and tine Features: 1) Material: 65Mn, 60Si2Mn 2) Hardness: 40-50 HRC 3) Process: Heat treatment 4) All kinds of springs for combine harvesters and mowers, like spring tine, torsion spring, press spring, pull spring and nylon tines 5) Colors: self-colored, any electrophoretic color, chromated, Red/ green/ black planting or as requested