Fitment: Mud Flaps for Trucks Mud Guards Compatible with 1999-2007 Silverado/Sierra 1500 Top Graded Materials: The mudflaps is made of top graded PP material which is after rigorous tests ensuring that the mud flaps is water corrosion-resistance and work safe in all harsh environment. Functional: The truck mud flaps protect your vehicle from damage by snow, water, mud, ice, soil, salt, gravel, rocks. They can also effectively resist hot and cold weather & prevent debris from damaging the surface of the car. Easy Installation: The package includes 4pcs mud guards both driver and passenger Side with mounting hardwares for easy installation.