This set of Wheel Lock Nut is suit for your Wltoys 12428 12423 FY-03 RC car. Features: Precision CNC Machined for factory spec fitment. 4mm M4 wheel lock nut, a good helper to you. Easy to upgrade from original part. Compatible with: 1/12 Wltoys 12428/12423 FY-03. Any problem, please contact our store without hesitation. Honor to serve you. Specification: Name: Wheel Lock Nut Model: M4 Hole Size: 4mm Height: 6.5mm Main Material: Metal For Vehicle Type: for Wltoys 12428 12423 FY-03 Color: Blue Quantity: 4pcs Package Information: Package Size: 8.2 * 2.3 * 1.2cm / 3.22 * 0.90 * 0.47in Package Weight: 4g Poly Bag Package Package List: 4 * M4 Wheel Lock Nut