... 2.Strong magnetic force N35~N50 3.Nickel,Black,Gold,Silver, Blue, Copper 4.ISO9001:2000 and the CTI Neodymium Iron Boron ... , 7mm, 8mm of N35.2.Coating: nickel, black nickel, silver, gold, blue, copper...3.Tolerance: +/-0.02mm4.Delivery time: 7 days (mainly ...