Moeller Battery Box fits two 6 volt batteries. Non-corrosive high-strength polyethylene construction resists chemicals and rust. Maintains tough properties with nominal 0. 185 wall thickness on roto-molded (mixed linear-black) boxes. Complies to industry requirements and meets Coast Guard regulations (E10). Outside dimensions: 15.6" Long x 11.35" Wide x 13.01" High. Inside dimensions: 14.61" Long x 10.48" Wide x 13.01" High.