AUXMART Upper Windshield Mounting Brackets 50 inch Straight Light Bar Kits SS-026 1999-2006 Silverado Fit Type: for Chevrolet silverado 1999-2006 and GMC sierra 1999-2006, compatible with 50inch straight light bar with 7mm post. Safety & Stability: aerodynamic design reduce wind resistance and noise, hold the light bar on roof firmly, suit for all of the enviroments even in the extreme weather. Materials: made of durable and high-quality solid steel, matt black make your showing vehivle eye-catching brilliance. Tips: minor drilling may be required for mounting, without bulky brackets, not fit 50" curved light bar, professional installation is needed if necessary. What You Get: 2 x upper windshield mounts 50in straight light bar) + 1 set x mounting kits.