... series, 3200 series,3300 series 2) Material of rings and balls : chrome steel:GCr15 or ceramics: Zr02 and Si3N4 3) Material of cage ... : steel cage , nylon cage,brass cage and PEEK PI cage,AISI ... ,IKO,KBC,INA,URB, ect.Our brand:HYIBRing MaterialChrome steel,Carton steel,Stainless steelDelivery dateNormally have stock within 7 daysPayment TermA:30 ...