This arc neodymium magnet is made of grade N45 NdFeB magnetic material under ISO 9002 quality systems. It is magnetized though thickness with N pole on the inner diameter. Ten pieces of this arc magnets can form a perfect circle with OD=32mm, ID=20mm and height=6mm.
Materials: Sintered NdFeB, grade N45
Gauss Rating: 13,800 gauss
Hcb: 11.6 KOe
Hcj: 12.00 KOe
Working Temperature: 80 degree celcius or 176 Fahrenheit
Pole Orientation: through thickness. The N pole is on the inner diameter
Coating: Ni+Cu+Ni plated. the best coating available.
All magnets are fragile and may break but if used properly it can last for a life time
Keep it away from pacemakers and children under 5 years old