... and wear resistance 3.good hardness and durable Magnetic Powder Major components - iron, cobalt, nickel Features: ... level among similar products.6. The magnetic powder’s color is in line with Japan ... good hardness!7. Can match with the magnetic powder brake and clutch from home and abroad ... machinery, bag making machinery, restore the tension of magnetic clutch,Brakes, uniaxial, biaxial, hollow shaft, ...