Plastic Bonded Ferrite Magnets are made of bonded ferrite powder and plastic binder (PVC, Nylon, PP...etc)
Corrosion resistance of both ferrite and matrix material is good.
Precise sizes and complicated shapes can be made through injection process. They are widely used in DC motros, stepper motors, speedometers, petrol level gages, pumps for wind screen washers and many more.