Specification Brand : FIRST4MAGNETS Label : Magnet Expert® Manufacturer : Magnet Expert® MaterialType : Copper Model : SP101H2-40 NumberOfItems : 40 PartNumber : SP101H2-40 ProductGroup : BISS Basic ProductTypeName : UTILITY_MAGNET Publisher : Magnet Expert® Size : pack of 40 SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/31YiLyJrZAL._SL75_.jpg SmallImage_Width : 75 Studio : Magnet Expert® Title : Neodymium Halbach Array Magnet for Placing on a Non-Magnetic Rod and to Produce a Halbach Array - 10mm x 10mm x 10mm with 2mm Hole Through The Side - Pack of 40