TOTS Wltoys 12428 12428-A 12428-B 12428-C RC Car Spare Parts Upgrade Metal Differential / Differential gear 12428-0091/12428-0133 (16 Pcs) 2 Pieces 30T differential gear 4 Pieces 24T differential planetary gear 8 Pieces 12T differential planetary gear 2 Pieces 12T drive gear Package Included: 1 x 16 Piece set differential gears