... 3.Grade:N,M,H,SH,UH,EH,AH Super high quality Round NdFeB Magnets We are a sintered neodymium (NdFeB) magnet ... line for many years.We have confidence in providing your high quality products.Features:1. Material:Sintered Neodymium-Iron-Boron.2. Temperature ... ratio of length and diameter, coating and environmental factors.3.Density:7.4~7.65g/cm³,Reversible Temperature coefficient αBr-0 ...