Accurate and efficient: different colors on the bar represent different ranges, red range on the bar: 0 - 3/32; yellow range on the bar: 3/32 - 6/32; green range on the bar: 6/32 - 32/32, Allows you to read and calibrate quickly and easily 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 safer Measurements: Tire gauge measures approx. 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 & Green Material:Metal Package Contents: 40 x Tyre Tread Depth Gauge