... ,block,ring,disc and so on... 2).Certificate: ISO9001:2008 3).Grade: N35-N52, ETC 4).Located in Shanghai NdFeB magnet ... is up to 200 degree centigrade or 380 curie temperature; 3) Grade:N33-N52,33M-48M,33H-48H,30SH-45SH,30UH ... , loudspeakers, magnetic hooks, magnetic holder, filters automobiles and so on; strong Ndfeb Magnet Square