Specification:

Size: Ring 47-18x8 N35
Outer Dia: 47 mm
Inner Dia: 18 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.