APS NB-Z3113B Black Coated Nerf Bar Bolt Over for select Mercedes-Benz GL450 Models Brand new nerf step side bars sold in pairs with both driver side and passenger side. Excellent option for your truck and SUV. 3" diameter tube made of heavy-duty carbon steel with black coating. Secure and look cool. long-lasting and rust-resistant. Bolt-on to the factory mounting holes without any drilling. All hardware and easy-to-read installation and figures are included. 5-Year warranty. Buy with confidence!