Heavy-duty grade battery box for automotive, marine, lawn and garden and more; designed for a single group U1 battery Compact design; features reinforced handles to prevent cracking during relocation and ventilation holes for releasing battery gases Designed for rugged environments; impact resistant down to -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 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 Mighty Max Battery Group U1 Battery Box for Sun Xtender PVX-340T