(1) closed-end stamping outer needle bearing

 (2) inner circle needle bearing

 (3) has no inner circle needle bearing/no inner circle 

 (4) maintain and without keeping filled with needle bearings

 (5) Brand : SKF.  KOYO. FAG. TIMKEN. And so on.

 (6) Number of row  :Single row or double row

 (7) Material : Chrome steel ,stainless steel ,bearing steel

 (8) Vibration noisy lever  :Z1, Z2

 (9) Tolerance codes  :ABEC-1