1.low noise and long life 2.ISO 9001:2000 quality 3.low noise ,high quality,fast delievery Roller Bearing :CYLINDRICAL ROLLER BEARINGSeries:N, NU, NJ ... service:Such as: timken, skf,f ag, ntn, ina, etcApplication: cylindrical roller bearing is widely used in metallurgy, mining, printing machines, rolling machines ...