Trail FX A4001B Nerf Bar Trapezoid Side Steps With Step Pads. 4 inch trapezoid straight powder coated titanium black. Material is steel with plastic end caps. Rocker panel mount. Compatible with 2007-2018 Chevrolet Silverado 1500/ 2019-2019 Chevrolet Silverado 1500 LD- Old Model/ 2007-2013 Chevrolet Silverado 2500 HD/ 2015-2019 Chevrolet Silverado 2500 HD/ 2007-2013 Chevrolet Silverado 3500/ 2015-2018 Chevrolet Silverado HD/ 2007-2018 GMC Sierra 1500/ 2019-2019 GMC Sierra 1500 Limited- Old Model/ 2007-2013 GMC Sierra 2500 HD/ 2015-2019 GMC Sierra 2500 HD/ 2007-2013 GMC Sierra 3500 HD/ 2015-2018 GMC Sierra 3500 HD.