Structure: High quality copper wire Imported bearings from Japan Sturdy coils after high temperature and high pressure treatment High quality permanent magnet Wear resistant metal shaft High quality plastic back coverCertificates: ISO9001 CERTIFICATE SGS CERTIFICATE ROHS CERTIFICATE CUSTOMERS PRAISE MAILApplications:We also have motors dia from 10-50mm,applications as followings for your reference:Dental equipment, drone, medical equipment, tattoo machine, tattoo pen, beauty pen, electronic lock, scar treatment instrument, nail gun, blood ana...