Here we have a huge NdFeB Block, we just have a few of them. They measure 2in x 2in x 1/2 in and they're a bit odd because they are magnetized through the 2 inch dimension (so poles are on the 2" x 1" surfaces). We were told these were N45 grade but we cannot verify that so we're not really sure. They're not coated so they may have minor corrosion and small chips on the corners. These are terribly strong and brittle so be careful!