Camco's Double Battery Box safely stores automotive, RV and marine batteries. Made of heavy-duty, corrosion-resistant polypropylene, it holds (2) 6V Group GC2 batteries or (2) 12V Group 24/24M batteries. The box's inner dimensions measure 21.5-inches (L) x 7.4-inches (W) x 11.2-inches (H). Includes (2) straps and (4) strap clamps with screws. The Double Battery Box meets U.S. Coast Guard CFR 183.420 and ABYC E-10.7 specifications when used with (2) 6V Group GC2 batteries. Quantity: 4.