ferrite magnet: shape:block size:according to you needs grade:Y30 certification:SGS,ISO9001,Rohs ferrite magnet:China Shen Zhen AIM Magnet CO.,LTD is a professional supplier of magnetic material ,offer all kinds of superior frrite magnet.we has work-hard person,wise leader,standard workroom,advance nachine,so we can guarantee the quality of ferrite magnet and the date of delivery