Accurate and efficient: different colors on the bar different ranges, red range on the bar: 0 - 3 or 32 yellow range on the bar: 3 or 32 - 6 or 32 green range on the bar: 6 or 32 - 32 or 32, Allows you to read and calibrate quickly and Reusable: The tire tread gauge is made of strong material, reusable and long-lasting, it is an effective tool to monitor tire tread level and make driving Measurements: Tire gauge measures . 3.35 x 1.06 inches, small size, also features a pocket clip for easy portability, you can clip it to your pocket, great for quick and easy access SIMPLE TO USE AND EASY TO READ: There are 3 different color coded areas on the strip for added simplicity and convenience, they show you a clear result of the condition of your tire, very easy to read, give you a quick and accurate tread measurement depth , intelligent and efficient Colour:Silver and Green Material:Metal Package Contents: 20 x Tyre Tread Depth Gauge Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.