Flexible rubber magnet covers a wide variety of magnet materials. The different categories are defined partly by the actual input magnet chemical constituents and partly by the magnet material manufacturing process. The most common constituents in Flexible ferrite magnet material Barium Ferrite and Strontium and, more recently, in rare earth Flexible material, Neodymium Iron Boron, all loaded into PVC binders. Most Flexible magnet material is produced in strip or sheet by extrusion process. Higher magnetic characteristic/performance Flexible material is obtained either by work rolling/hardening in the rolling process or by including special additives to the chemical constituents.