Specification:

Size: Ring 32-18x6mm Fe   
Outer Dia: 3.2 cm
Inner Dia:1.8 cm
Thickness: 0.6 cm
Grade: Y 30
Color: Black
Max Operating Temperature: 300°C   

Description:
Ferrite also is known as Ceramic Magnet is a Composition of iron oxide and barium or strontium carbonate. These materials are readily available and at a lower cost than other types of materials used in the making of Permanent magnets.