We have different testing machines to design accurate and precise parameters for our products. All products are performance tested. Made of high-quality materials, lightweight, rust-proof, colorfast and durable. Excellent after-sales product. According to for-original factory specifications, it perfectly matches the for-original car. Replaces old or damaged products, easy to install. Alternate manufacturer part number 800312990 for reference. Colour:As Shown Material:Aluminum+Plastic Package Contents: 1 * Electric Side Stepper Motor 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.