ZROADZ patent pending noise cancelling Wind Diffusers provide an easy method to silence noisy roof mounted LED light bars. The simple installation process is designed to work with most standard heat sink LED light bars and will virtually eliminate wind noise caused by the airflow passing around the light bar. ZROADZ wind diffusers are a must have for any roof mounted LED light bar. ZROADZ has configuration options for LED light bars straight & curved, double row & single row, 40" - 52" in length. All ZROADZ Wind Diffusers are powdercoated gloss black finish. ZROADZ Wind Diffusers are designed and made in USA. Includes limited lifetime product warranty, 3 year warranty on the finish.