Accessories and Parts -12mm 15-25mm Hex Hub Extension Adapter for RC Crawler Black -15mm Highlights Generic Brand 12mm 15-25mm Hex Hub Extension Adapter for RC Crawler Black -15mm Description: Material: aluminum alloy. Light weight and durable. Long extension: 15mm, 20mm, 25mm. Suitable for 1:10 Crawler Wraith CC01 AXIAL SCX10 D90 AX10 F350. The coupler increases vehicle stability, cornering speed and braking efficiency. Perfect design, exquisite workmanship and high performance. Specification: Color: Red, Black, Purple, Blue for different size. Hex Hub: 12mm / 0.47inch Package Include: 4 Pieces Wheel Hex Hub Adapter 1 Accessory Pack (As Picture Show) Note: Due to the difference between different monitors, the picture may not reflect the color actual item. Due to manual measurement, there may be 1-2mm error in the size.