The Wingmaster Stainless Steel Peterbilt Battery Box Lower Step Cover with Sides is a practical and durable accessory for your truck. Made of stainless steel, this set of three pieces fits most Peterbilt 389 makes and models. It not only enhances the appearance of your battery box lower step, but also provides added protection. With its easy installation and high-quality construction, this step cover is a reliable choice for truck owners looking to improve their vehicle's functionality and aesthetics.