Magnet Shape: Ring with Cylindrical Borehole (Hole)
Material: Sintered Hard Ferrite (Ceramic) and Steel
Coating: Nickel (Ni)       
Grade(Chinese Stardard):         Y30BH
Magnet ID:              Y30BH-Pot-Ferrite-Borehole-90-Ni  
Detailed magnetic properties data:
Residual Magnetic Flux Density (Br): 3.8-3.9 KGs (mT):  380-390 mT
Intrinsic Coercivity Force (Hcj):    2.80-2.95 KOe    223-235 KA/m
Coercivity Force (Hcb):              2.90-3.08 KOe    231-245 KA/m
Energy Density (BH)max:              3.4-3.7 MGOe     27.0-30.0 KJ/m³
Operating Temperature:               -40 °C to +250 °C
Magnetisation Direction: Axial / Radially magnetized
Pot Magnet Size:
Pot Diameter (D):  90 mm
Pot Height (H):    15.5 mm
Borehole  (d1):    12 mm
Borehole  (d2):    16.6 mm
Depth      (t):    9 mm
Tolerance:         +/-2% mm
Delivery time           7-25 days
Measurements

Potmagnete.com specialized in manufacturing pot magnets assembly. Pot magnets are constituted by permanent magnets such as neodymium magnets, ferrite magnets, and other parts like metal, rubber, plastic. The magnet is encased in a metal/steel case like a "pot" with one face not enclosed. Sometimes, pot magnets are called as magnetic cup, cup magnets or magnetic metal cup.

Strong ferrite Pot Magnet is the third generation of rare-earth permanent magnet, is the most powerful and advanced commercialized permanent magnet today. ferrite has high coercive force, high energy and high performance/ cost ratio. It can be formed into various sizes and widely used in many fields such as aviation, electronics, instruments, meters, machines and medical instrument.
We are the magnet manufacturers in ningbo, China. We have advanced automatic production equipments and testing instruments. We are gathering a group of experienced professional and technical personnel engaged in manufacturing magnetic materials and magnetic products.