ITEM NAME:18cm Aluminum Universal Car Auto Manual Gear Stick Shift Knob Shifter Description Material: aluminum alloy Color: Gold Size: 18CM Product list: gear shift knob *1, thread adapter *3( M8/M10/M12 ) Installation: 1. Remove shift boot console so that you can see the shift lever, and original factory shift knob from the shifter. 2. Package comes with 3 plastic hose with different diameter. Verify which plastic hose can fit the shift lever. 3. Place the shift knob collar over the shaft with thread facing upwards 4. Place shift knob over spacer 5. Screw collar to base of shift knob 6. Finish installation, ensure the gear knob is firmly attached to the shifter 7. 3 different size screw adapter: 8mm,10mm,12mm 18cm Aluminum Universal Car Manual Gear Stick Shift Knob Shifter Gold Color.18cm Aluminum Universal Car Manual Gear Stick Shift Knob Shifter Gold Color. Size: 18CM. Remove shift boot console so that you can see the shift lever, and original factory shift knob from the shifter.