Precision ball bearings for installation in all motors of the 15th series of Tenshock.
Series VZ (Viper), EZ (EDF), CZII numbers 1515, 1520, 1530, 1535, 1540.
Suitable for replacement of the front or rear bearing staff.
Accuracy class ABEC 5 (on a scale of possible bearings quality, this is "seven, from then").
Dimensions 4 mm × 11 mm × 4 mm.
Closed on both sides with protective metal rings.
Made of bearing steel GCR15.
NOT stainless steel.
Comment: in their motor, manufacturer sets the bearings of lower quality (especially in the Viper series motors) than the bearings offered to your attention.
Just trust knowledgeable person.
Complet of delivery: one ball bearing.