Mag Dev-Pot-Type-Holding-Magnets-Mag Dev-ASSF06188-p-A-sintered-ferrite-permanent-pot-type-holding-magnet-that-works-by-directing-&-concentrating-the-magnetic-flux-from-each-pole-of-the-magnet-to-the-exposed-active-face-Suitable-for-a-wide-range-of-applications-p-Magdev-ASSF06188-Sintered-Ferrite-90x 12mm-Pot-Magnet-Kit-4-piece-pack-