1. ROLL Bearings wide range of applications 2.Inexpensive high-quality, strong supply capacity 3.Long Life Cycle roll bearin Roll Bearing a detailed description of the following: Outer dia: 20mm Inner dia: 9mm Width: 6mm Curvature: 0.3 Steel ball rolling body: Number 9 Size: 2.381 If you have demand please contact us, we will let you have a satisfactory, thank you!roll bearing