Specification:

Size: Ring 35-21.6x8mm N35
Outer Dia: 35 mm
Inner Dia: 21.6 mm
Thickness: 8 mm 
Grade: N35
Coating: Nickle - Ni  
Max Operating Temperature: 80°C   

Description:
Nickel Coated Magnets have many industrial, educational and household uses. These Magnets are highly resistant against demagnetization.