The Kenworth W900B 45 Inch Single Step Battery Box Assembly is a practical and reliable solution for Kenworth W900B models. This battery box assembly comes with a single step, making it convenient for easy access. It fits most Kenworth W900B models and is sold individually. With its durable construction and functional design, this battery box assembly ensures secure storage and protection for your batteries. Upgrade your Kenworth W900B with this efficient and reliable battery box assembly.