High strength Neodymium NdFeB (Rare Earth) shallow pot magnets with counterbore for secure holding 10 Stück Pot Magnets Satz 10x B42 Heavy Duty 42mm / 32kg Borehole Neodymium Rare Earth Pot Starke Seltene Erden Magnete They are the worlds strongest type of magnet and are composed of Neodymium, Iron and Boron (NdFeB) elements. We sell magnets ranging from N35 to N52, also with various coatings Neu, Bundle Listing: No, Brand: Unbranded, Model: PMYP-B42, MPN: Does Not Apply, UPC: Does not apply