Ring magnets are typically made for loudspeaker systems and their sizes have evolved with demand from this market. However, they are also commonly used in magnetic rollers for separating applications and in the printing industry. Because these magnets are weakly magnetised they are not suitable for weight-bearing applications, but instead are commonly used in sensors and other similar applications.

Sintered ferrite magnets can be used in between -40 °C and +200 °C 
Being hard and brittle, they can be cut by using diamond tools. 
The raw material of sintered ferrite magnets is oxide, thus they would not be rusted under severe environment nor affected by many chemicals (except some strong acids).

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