Thrust ball bearing 1 OEM available 2.Certificate ISO standard 3.Non standard with inch provided 4.Best price and quality Single direction type and double direction typeHardness :59-63HRCPrecision Level:P0,P3,P4,P5,P6Clearance: C2,C3,C4Series: 51100,51200,51300,51400,52200,52300,52400,2900 inch and non-standard nsk ball bearing 6003-zz