... & accurate tolerance 3) fast and safe delivery & excellent service N42 8*5mm strong neodymium magnet These magnets will have approximately 5150 Gauss ... ,SH,UH,EH)Various sizes CustomizedShapeBar, Strip, Stick, Block, Sheet, Round, Disc, etc.MaterialsSintered Neodymium-Iron-BoronCoatingNickel,Zinc, Nickel+Copper+Nickel ...