General Fit: This Stick Shift Knob for car is designed to meet the expectations and provide better performance. We strive for satisfactory function on nice materials and precision engineered knob. With our direct replacement fit, our shift knob head will save your time and effort on car accessories. Functions: Universal design for most car. They are designed to fit seamlessly with your knob existing components without requiring any additional modifications, making installation quick, simple, and convenient. Specifications: Type: Car Shift Knob, Color: Green, Material: Acrylic, Adapter Thread Size: M8x1.25, M10x1.25, Knob Hole Diameter: 10.8mm / 0.43"(D), Knob Size: 15x5cm / 5.91"x1.97"(L*W), Package List: 1 pc Shift Knob, 2 pcs Adapters. Installation of Gear Shift Lever Knob: 1. Remove the existing gear shift knob, measure the diameter of the screw rod. 2. Choose one piece appropriate adapter from 2 pieces. (Note: If the two adapters are not the same size as the car screw rod, please choose the closest size of the adapters, fasten it with adhesive tape, then tighten the shift knob stick.) 3. Put the adapter into the gear lever. 4. Put the new shift knob head directly into the gear rod. Notes: Please make sure your existing stick shifter removable. 1. If your MANUAL car reverse gear needs to be lifted, then it can't be used. 2. If your AUTOMATIC car reverse gear needs button lock, then it can't be used. 3. If your existing gear knob can't be removed, then it can't be used. The size measured by hand, so it may have a little 1-3 mm difference.