Description: 【Compatibility and Fit】: This Steering Wheel Horn Button is designed for 9 bolt Steering Wheels 【Material】: Crafted from aluminum alloy material, this horn button features a high mirror polished surface that adds a touch of elegance and durability to your steering wheel setup 【Dimensions】: The horn button has an outside diameter of 4.45inch with a center button diameter of approximately 2.99inch, making it an ideal size for easy access and functionality 【Installation Tip】: For optimal performance, remember to oil the O-ring when installing the horn button on your steering wheel to ensure smooth operation and longevity 【Package Included】: 1 Steering Wheel Horn Button Specification: Package Size: 13.5cmx11cmx15cm/5.31inchx4.33inchx5.91inch Outside Diameter: 11.3cm/4.45inch Center Button Diameter: 7.6cm/2.99inch Package Includes: 1 Steering Wheel Horn Button Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.