High Precison,Corrosion Resistance,long life,low noise,excellent material,perfect package.Wearing resistance. Bearing No.Hex Shart sizeBoundary dimensionsBADBeBi202KRR39/16"16.4614.3351113204KPP211/16"20.2417.65471420.96204KRR211/16"20.2417.65471420.96204KRRB211/16"20.2417.65471420.96204KPPB211/16"20.2417.65471420.96205KPP27/8"25.722.25521525.4205KPPB27/8"25.722.25521525.4205 KRR27/8"25.722. ...