Roller BearingChina Torriani Gianni (TG series I. 20. B) Slewing Ring Internal Gear Slew Bearing (I. 816.20.00. B), Find details about China I. 486.20.00. B, I. 616.20.00. B from Torriani Gianni (TG series I. 20. B) Slewing Ring Internal Gear Slew Bearing (I. 816.20.00. B)