1koyo brand bearing/romdamientos 2Material GCr15,GCr15SiMn 3Certification ISO9001:2008 4best service and competitive price item bearingkoyo deep groove ball bearingmaterialchrome steel, carbon steel, stainless steelcertificateISO 9001: 2000packingindividual box packingdelivery timeprompt delivery , we have in stockadvantagehigh quality and competitive pricedefinedrodamientosnaturehigh speed, high ...