The 14 Gauge Stainless Steel Battery Box is a durable and practical solution for your 389 Peterbilt. Made from complete stainless steel, this battery box is built to last. It fits most 389 Peterbilt makes and models, but be sure to check the year and style before ordering. This battery box is sold individually and is a reliable choice for keeping your battery secure and protected. With its sturdy construction and compatibility with a range of Peterbilt models, this battery box is a practical and long-lasting investment for your truck.