Description: Corrosion-resistant- chrome-plated aluminum tubing is rugged yet lightweight. Wide- slip-resistant step pads are made of plastic to provide sure footing. Available in 4in and 5in tube diameters. Easy to install. no drilling is required. Step Bars, 4" Diameter, Chrome. These original equipment step bars are available in durable chrome or black finish. Ample width provides sure footing. Easy no-drill installation.rnrn.