The LED headlamp fits for Freightliner Cascadia 2018-up. Package included 1 x left driver side LED performance headlight. Waterproof IP54. Durable against poor weather including rainy, snowing, freezing, fogging. DOT approved. Easy to install, users can be replaced anytime and anywhere. The modified headlight directly replaces for OE style headlamp. It makes your truck more handsome and cool. Note: 1. In order to avoid over-adjustment and causing the headlight parts damage, if you find that the adjusting screw cannot be adjusted, please don't continue to adjust it. 2. If the headlights are foggy, this is normal. Typically, you can simply leave your headlights in a warm place or in the sun for a few minutes and the water vapor will dissipate naturally.