This extension cable is used for vehicle backup camera system, as an indispensable accessory between auto monitor and camera! different vehicle model require different vehicle rearview system, and cable/adapter as well. During the past 10 years, we have been developing and producing camera cable/adapter for various vehicle model such as car, school bus, heavy duty truck/trailer, caravans, agricultural vehicles, construction vehicle, etc. As a high quality connection cable, it must be able to promise stable hd signal transmission.Besides, it must be long-lasting even in strict environment, so as to reduce possible cost of maintenance or replacement. 20pcs per poly bag