1, low noise, good resisting corrosion function, long life. 2, best service ... following: 1, Series: 60000 series, 6200 series, 6300 series and 6400 series.2, Corresponding types: 605-6032, 625-6248, 6300 ... , Z, ZZ, RS, 2RS5, Snap ring: N, NR6, Vibration and noise level: Z1, Z2, Z37, Precision level: P0, P6, P5 ... good business partner of you ! offer deep groove ball bearing with high quality & low price