Ø31.5 mm Diameter Countersunk Ferrite Magnet – Ø31.5x11.5/5.5x15 mmThis countersunk ferrite magnet is manufactured with ferrite material instead of nickel coating, featuring a Ø31.5 mm outer diameter, 11.5 mm thickness, and a 5.5x15 mm internal countersunk hole. The central countersunk hole allows f..