R20 Open/Zz/2RS 31.75X57.15X12.7mm Wheel Roller Ball Bearing Shang Hai Hongshi Bearing Co., Ltd Base Info Description Pre：R18 Zz-2RS 10 28.575X53.975X12.7mm Wheel Roller Ball Bearing Next：R22 Zz/2RS 34.925X63.5X14.288mm Wheel Roller Ball Bearing
