... .Grade:N,M,H,SH,UH,EH,AH Super high quality Round NdFeB Magnets We are a sintered neodymium ... in providing your high quality products.Features:1. Material:Sintered Neodymium-Iron-Boron.2. Temperature: the max operation ... is up to 200 degree centigrade or 380 curie temperature. 3. Grade:N33-N52,33M-48M,30H- ... factors.3.Density:7.4~7.65g/cm³,Reversible Temperature coefficient αBr-0.09~-0.13%/°C,αHcj ...