made in germany 1.Materical:GCr15SiMn 2.ISO9001:2000 Ball Bearings 3.OEM ... series: 1200 series, 1300 series, 2200 series, 2300 series2) Material of rings and balls : chrome steel; GCr15 and GCr15SiMn 3) Material ... ) Precision: P0, P6,p5 5) Suffixes: a) "K", ID of bearing with tapered ,the taper is 1:12 E.G ... cage4) Precision: P0, P6,p55) Suffixes: a) "K", ID of bearing with tapered ,the taper is 1:12 E.G ...