We have various testing machines to design accurate and precise parameters for our products. All switches are performance tested. According to the factory specifications, it fits the car perfectly. Replaces old or damaged products, easy to install. Colour:Photo Color Material:ABS Package Contents: 4 x injector 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.