... magnet high Br, Hcj & (BH)max, various sizes, ring shape, grade from N35 to N33EH, salt test: 24 to ... 72 hours. Ring rare earth magnet We are well equipped to manufacture these ... factory can manufacture NdFeB magnet in various size, according to the customer's specification Surface Treatments: Zinc, Copper+Nickel, Epoxy, Gold ...