2021 New Style: First to start bling engine start ring with 2 ROWS of diamonds, super bling! The crystal decoration is made of rhinestone, which is shiny and beautiful. The bling valve stem cap is made of good quality and durable plastic, dust proofand waterproof with detailed stripe design. Specification:Each tire valve cap measures approx 0.6in * 0.5in.Engine start bling ring outer diameter is1.5 inch, inner diameter is1.25 inch and thickness nearly 0.12 inch.They are normal size for standard American vechile Easy to install:the tire valve caps are dome shape, installation only need screws it onto tire valve stem. Bling engine start button sticker has an adhesive tape, which can provide you convenience for the process of installation, just peel off a sideof tape and stick to bling ring, then peel the other side of tape and stick to button tightly. Application: with the adhesive interior ring, you can decorate your car engine start/ stop push buttons, car a/c knobs, radio switches, stick shift beautifully and easily. Any question, please feel free to contact us, we will help solve your problemas soon as possible. Great Gifts: If You like your car you should put a button stickers on it, this car accessories can also be a great gift for anyone!