Universal Luminous Gear Shift Knob for Car Acrylic Gear Stick Stick Manual Transmission Shifter Car StylingProduct Description:Material: AcrylicLength: 92mmAdapters (8mm,10mm,12mm)Direct replacement for the original knob, no modification required. It helps you with the lever when shifting gears to help you shift quickly. Upgrade your ride comfort and interior design. Package Included: 1 x Gear Shift Knob with Adapters (8mm,10mm,12mm) Mounting: Universal Mounting for Most Manual Vehicles. (Please check the thread size of your vehicle to see if it fits our adapters)Installation:1. Remove the original factory stick head from the gear lever.2. Place the new knob on the gear lever and attach the corresponding nut.3. Make sure the knob is firmly attached. No instructions. Professional installation is highly recommended.