High quality: Made of high quality zinc alloy, make your car push to start button bling and beautiful. Size: coaster 2.71 inch diameter, 0.2 inch thick. Ring Outer Diameter 1.53 inch, Inner Diameter 1.18 inch.. Easy installation: Installation can be completed in 1 min. Application: Can be used for car engine start/ stop push buttons, radio switches, a/c knobs,stick shift etc. Attention: Ring may don't fit for 2015-2017 Hoda Civc and some models of Mercede/Nisan/Ddge/Jep, please check the diameter of the Engine Ignition Button .