12mm Diameter, wonderful replacement for the old or broken one, directly fitment. High performance CNC machining makes its size accurate and performance stable, anodized surface, beautiful appearance. Made of high-quality aluminum alloy material, environmental-friendly, strong, wear resistance. Improving comprehensive performance for your RC car, making it more attractive. There are 3 different sizes available, you can choose by your needs. Feature: 1. Made of high-quality aluminum alloy material, environmental-friendly, strong, wear resistance. 2. High performance CNC machining makes its size accurate and performance stable, anodized surface, beautiful appearance. 3. There are 3 different sizes available, you can choose by your needs. 4. 12mm Diameter, wonderful replacement for the old or broken one, directly fitment. 5. Improving comprehensive performance for your RC car, making it more attractive. Specification: Condition: 100% Brand New Item Type: Wheel Hex Hub Material: Aluminum Alloy Optional Size: 8.0mm, 9.0mm, 10mm Quantity: 4pcs Diameter: Approx. 12mm / 0.5in Fitment: Fit for SCX10 90046 90047 RR10 crawler Package List: 4 x Wheel Hex Hub 4 x Pin 4 x Screw Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.