Part Ref: 3801-VRS MAX Dual Row Bearing 
Bearing ID: 12mm
Bearing OD:  21mm
Bearing Thickness: 8mm
Used on: Frames（Suspension Pivot）
Material: Chromium Steel 100Cr6 (Race & Balls)
Grease: Mobil XHP-222 or SINOPEC HTHS Bearing Grease
Seal: Double-sealed 2RS