Heavy-Duty Steel Construction: Made from high-quality steel with a black protective coating, this battery box is durable, waterproof, sun-resistant, and fire-resistant for long-lasting performance. Secure & Functional Design: Features side handles for easy carrying, a lockable lid (lock included), multiple reserved holes with rubber grommets for cable protection, and pre-drilled bottom holes for secure mounting. Custom Fit for Group 27 Batteries: Specially designed to fit Group 27 battery sizes, making it ideal for cars, marine use, RVs, trailers, and camping applications. Spacious Dimensions: Internal capacity supports batteries up to 13.78″ L × 7.8″ W × 11″ H, with an external size of 14″ L × 8″ W × 11.25″ H. Complete Package: Includes 1 steel battery box, 4 rubber rings, 4 mounting screws, and 1 lock for convenient installation and secure use.