Made of high quality aluminum alloy, durable, wear-resistant and not easily damaged. A good replacement for the old or damaged, simple installation. Lightweight, easy operation, reliable quality and stable performance. High performance,easy and convenient to install and use. Fits for SCX10 CC01; for WRAITH 90027 900341/10 rc car. Size Chart: 8mm:Opposite side length:12mm/0.47in;Height:8mm/0.31in; Hole Dia.4mm and 5mm 9mm:Opposite side length:12mm/0.47in;Height:9mm/0.35in; Hole Dia.4mm and 5mm 10mm:Opposite side length:12mm/0.47in;Height:10mm/0.39in; Hole Dia.4mm and 5mm 11mm:Opposite side length:12mm/0.47in;Height:11mm/0.43in; Hole Dia.4mm and 5mm 12mm:Opposite side length:12mm/0.47in;Height:12mm/0.47in; Hole Dia.4mm and 5mm Package Includes: 4 Pieces Hex Wheel Hubs Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.