Heavy-duty grade battery box for Automotive, Marine, RV and more; Designed for a single group 24 battery * Unique patented design; Features locking tabs to securely fasten the lid to the base, reinforced handles to prevent cracking during relocation, and vent caps to limit water entry * Designed for rugged environments; Impact resistant down to minus 20 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