Hign-concerned Chemical:NoneOrigin:Mainland ChinaSize:O.D 68mm / I.D 63mmMaterial:ABS + MetalColor:Black Silver,Silver Black,Red SilverProduct Name:CarWheelCenter CapsStyling Accessories (Outer Diameter 68MM) Product Size:Outer diameter 68mm/card foot protrusion 65mm/inner diameter 63mm/total height 14mm. Product Color: Black Cap ,Silver Cap . InstallationMethod: 1.Use tools to remove the original car wheel center caps; 2.Take out the purchasedcar wheel center caps, align it with the buckle, and press it slightly with force. The above dimensions are measured manually and may have an error of 0.1-0.5MM. Our factory mainly produces and operates wheel hub modification covers, wheel hub cover labels, and wheel hub accessories. There are many styles available, and if you need other styles, please contact us directly. HOW TO MEASURE THE WHEEL CENTER CAPS Before you place the order, please check the tips of how to measure the right size of hub caps you want. It's better to use the Vernier to measure the sizes. 1. Measure the wheel center hole Please check the following bottom photos. There are total two sizes you have to measure. First is the Outer Diameter(O.D), second is the Inner Diameter(I.D). 2.Measure the old wheel center caps you have Please check the following bottom photos of the right method to measure the sizes of hub caps. 3.If you still do not know how to measure the size, you can ask the supplier of the wheel hub caps of the sizes, including Outer Diameter, Inner Diameter and Length of Clips. Note:Please check these are the correct size before purchasing. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. Included: Set of 4.