In this section you will find our 27mm (1.06") diameter countersunk neodymium magnets with speciality coatings including rubber and PTFE. PTFE coated neodymium magnets are completely coated and are ideal for using outside as the coating protects them from corrosion. Our rubber coated magnets are double countersunk (on both sides), their rubber-coating makes them perfect for attracting fragile or easily marked surfaces as the rubber coating increases friction, softens impact and prevents marking.