【Direct Fitments】Compatible with 1999-2007 Chevy Silverado 1500; 1999-2004 Silverado 2500; 2001-2007 SIlverado 2500 HD/3500; 1999-2007 GMC Sierra 1500; 1999-2004 Sierra 2500; 2001-2007 Sierra 2500 HD/ 3500. Only comes with 2 pieces. 【Basic Function】The window visor wind deflectors for Silverado/Sierra can keep out the rain and let in the fresh air at the same time for it allows the windows to be open a bit when it rains. 【Easy Installation】Outside Mount. The high viscosity tape makes all your work easier. Professional installation are recommended. [NOTE: For better adhersion effect, a heat gun is needed. Preheat the mounting surface at the beginning and reheat the mounting edge after the installation finished.] 【Premium Material】Tinted, reinforced acrylic is UV and scratch-resistant. Made from durable high-quality acrylic,the vent visors will not be easily cracked. 【Warranty】We truly offer 1 year warranty with sincere customer service. If you have any questions, please feel free to contact us and we will reply. Compatible with 1999-2007 Chevy Silverado 1500; 1999-2004 Silverado 2500; 2001-2007 SIlverado 2500 HD/3500; 1999-2007 GMC Sierra 1500; 1999-2004 Sierra 2500; 2001-2007 Sierra 2500 HD/ 3500. Only comes with 2 pieces.