... magnet manufacturer in China so we can provide EXW price. 5mm neodymium backyballs Neocube toys nanodots magnets balls A fun puzzle ... N35 or N38 Neodymium magnet balls. Diameter: 4mm,4.8mm,5mm,6mm,7mm,8mm,9mm(tolerance+/-0.05mm) Color:Nickel,black ... ,red etc. base coating Ni-cu-ni. Magnetic force(N35grade):5mm 5000-5400guass,6mm 5400-5800guass,7mm 5800-6200guassCertification approved: SGS ...