... quality standard: ISO 9001:2000 standard.HTZC bearing types specialized: 6000, 6200, 6300, 6800, 6900 Series, with ZZ, 2RS, OPEN available;HTZC bearing application: ... Water Pumps, Agricultural Machines, Precision Machineries, etc. We are the Original Manufacturer of the ball bearing, with no Middleman involved, so we ... free to contact us, thanks!Looking forward to be a Good Business Partner of you.