Commercial grade battery box for Automotive, Marine, RV and more; Designed for dual 6-volt batteries * Rugged design for commercial applications; Four corner fastening system and captive lid for easy installations, large cable entry holes for large gauge cables, full flow ventilation for releasing battery gases, and large battery acid reservoir * Designed for rugged environments; Impact resistant down to minus 40 degrees Fahrenheit, withstands acid, gas, oil and other contaminants, and immune to UV exposure * Keeps your battery safe; Limits water entry, effectively collects battery acid, allows adequate ventilation, and protects against accidental contact of battery terminals * Ships in Certified Frustration-Free Packaging * Certified and tested; Meets United States Coast Guard (USCG) Code of Federal Regulations 183.420 and American Boat and Yacht Council (ABYC) E-10.7 specifications