Material Grade of NdFeB magnet: Magnet N-( N30, N33, N35, N38, N40, N42, N45, N48, N50, N52), working temperature: 80 deg. Magnet M-(N33M, N35M, N38M, N40M, N42M, N45M, N48M, N50M), working temperature: 100 deg. Magnet H-(N33H, N35H, N38H, N40H, N42H, N44H, N46H, N48H), working temperature: 120 deg. Magnet SH-(N30SH, N33SH, N35SH, N38SH, N40SH, N42SH, N45SH), working temperature: 150 deg. Magnet UH-( N30UH, N33UH, N35UH, N38UH, N40UH), working temperature: 180 deg. Magnet EH-(N28EH, N30EH, N33EH, N35EH, N38EH) working temperature: 200 deg. Magnet AH-(N28AH, N30AH, N33AH) working temperature: 220 deg. We can supply you the NdFeB magnet from N grade to EH grade. With high quality and low price. The shape of magnet: Block, Sphere, Disc, Ring, Segment, Cylinder, Sheet and so on or according to the customer's requested. Surface Treatments: Zinc, Copper+Nickel, Epoxy, Gold, Silver, Passivation, and custom coating available upon request.