Product Advantages: 1, Round magnet with countersunk hole size: 0-130mm 2, Magnetizing Direction: Thick 3, Assembling: Round magnet with countersunk hole can be assembled with steel casing or plastic shell in device. 4, Coating: Any special coating you may want, no problem! Even unusual such as black zinc. 5, Lead time: Sample of Round magnet with countersunk hole can be quick finished around 5 days, and ship free. 6, FEA analysis or simulation: FEA REPORT can be offered to client. 7, Report of physical detection: Can be offered to client.