RAFTUDRIVE 3 in Round C/S Running Boards Fit 07-17 Silverado/Sierra 1500/2500HD/3500HD (Excluding Diesel Mode) Ext/Double Cab (Not Crew) With 2 Full Size Front Doors and 2 Half Size Rear Doors Only fit 07-18 Silverado/Sierra 1500/2500/3500 Ext/Double Cab (Not Crew Cab) (With 2 Full Size Front Doors and 2 Half Size Rear Doors) Re:Not Fit Diesel Models w/DEF Tank 3" Inch round Style Tube + Slip-Resistant Plastic Step Pads Contents in package: 2 pcs bars (for driver side and passenger side respectively) + Brackets + Assembling accessories + Instruction Direct Bolt-On in Assembling, unnecessary drilling Made from heavy duty Carbon Steel, Black Powder Coated