Designed to work with most standard 50" finned Straight Single Row LED light bars. Eliminate annoying wind whistle caused by the airflow passing around the light bar with ZROADZ Noise Cancelling Wind Diffuser. The US Patented design provide an easy method to silence noisy roof mounted light bars. Bolt-on design, easy, one-piece installation, no cutting or drilling required. Powdercoated gloss black finish. Limited lifetime product warranty, 3 year warranty on the finish ZROADZ Wind Diffusers are designed and manufactured in USA and protected by United States Patent No. 10,525,872. Fit type: Universal Fit