Have different testing machines to design accurate and accurate parameters for our products. All products are performance tested. Made of high-quality materials, it is lightweight, rust-proof, colorfast, and durable. According to the original specifications, it perfectly matches the original car. Replace old or damaged products, easy to install. Please allow 1-3mm(0.039in) differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. You could contact me directly if you need wholesale, we will give you the best price.