The Wingmaster Peterbilt - 359 Sleep Side of Upper Storage Trim is a practical and durable addition to your Peterbilt 359 truck. Made of stainless steel, this trim piece is designed to fit most Peterbilt 359 makes and models. It provides added storage and a sleek, polished look to your truck's upper storage area. Sold individually, this trim piece is a reliable and stylish upgrade for your Peterbilt 359.