E90 bushing 40x45x50 (oversized)

Rods made of high-quality carbon structural steel corresponding to Japanese standard S45C, American 1045, and German C45. They have higher strength and resistance to deformation than regular A3 steel. The rods are hardened at a temperature of 840°C and tempered at 600°C, followed by chrome plating to improve wear and corrosion resistance, resulting in a hardness level of 52-58 HRC.