Threaded bushings are designed on top of the rubber coated magnets, typical sizes of rubber coated neodymium magnets with threaded bushing include 31mm, 43mm, 66mm and 88mm. All typical sizes can be shipped quickly. Magnetic force of standard threaded bushing rubber coated neodymium magnets are used with steel hooks. Rubber coated magnets with threaded bushing are ideal solution if you need rust-proof holding magnets. On the table,there are details for each size. Rubber color and the size of any part can be customized.