Go Rhino! (4101B) 4000 Series SideSteps Your Go Rhino 3" 4000 Series Round Nerf Bars are custom designed for a perfect fit onto your exact year, make and model These sturdy nerf bars line your rig with a solid step to give you a leg up on getting in and out of the cockpit The Go Rhino 3" 4000 Series Round Nerf Bars are crafted from heavy duty 3" steel tubing For even greater durability, Go Rhino uses extra thick .065" gauge steel