NdfeB Magnet(Neodymium magnet) various size up to your demand shape:ring/coil/block etc grade: N33-N50 welcome to contact us 1. NdFeB Magnet(Neodymium magnet)2. permanent magnetwith various type of size and shaped:grade: N33, N35, N38, N40, N45, etcshape: Ring/Round/Rectangle/Coil/Blockor any other OEM shapesize: up to youcoating: zinc/nickle/etc