Specification:Material: Carbon Fiber + Metal Shape: Round Ball Diameter: 50mm Adapter Thread Size: M8 x 1.25, M10 x 1.25, M10 x 1.5 Color: Black (We also have this item in red color in our eBay Store)Features:3 thread adapters included. Real carbon fiber gear knob. Easy to install, direct screw at installation. The original adapter is m12x1, 25 and will come with m8x1, 25, m10x1, 25, m10x1, 5 adapters.No modifications are required for stock application as long as the threaded adapter fits. Improves the look and feel of your vehicle. Package Includes:1 x Gear Knob1 x m8x1 Adapter, 251 x m10x1 Adapter, 251 x m10x1 Adapter, 5Installation:1. Remove the original factory stick head from the gear lever.2. Measure the diameter size of the threaded rod.3. Place the new knob on the gear lever and attach the appropriate adapter.3. Make sure the knob is firmly attached.