Vehicle compatibility: headlights assembly compatible with 2001 2002 2003 Civic Sedan 4-Door; high/low beam:9003; bulbs are not included | Waterproof: fully sealed with solid silicon & designed with one-way vents to prevent moisture from being trapped inside the housing, no corrosion or moisture worries in sorts of weather conditions | Brighter lighting: the metallic parabolic reflectors provide more light output to create a broader and smoother beam | Safety reflector: the sided micro-prism reflector makes the oncoming cars or passerby quickly notice you at night, ensuring your driving safety and others | Impact resistance: the polycarbonate lens & tough housing are highly resistant to shock, vibration for any tough road; professional installation would be highly recommended