Partsam Surface Mount Sealed 3LED 15" Red HI-Mount Center ID Light Bar 2-Wire Clear Lens Multi Function Rear Super bright 3 light Identification bar, with park/running lights. Application; For use on heavy duty trucks, semi trailers, cargo trailers, boat trailers, work vehicles and a wide or narrow overland vehicle requiring quality DOT rated lighting. No Corrosion, Sonically sealed, waterproof lens and housing all in a single unit. Multi Function Rear Super bright 3 light Identification bar, with park/running lights, Fully sealed. Offering customer technical service, feel free contact us for technical, installation and use question.