Vented RV/Marine Battery Box protects your RV/marine battery against collisions and contaminants. It stores group 24 batteries and is compatible with 3/8" ring terminals on battery cables. A vented design expels hazardous gases, allowing you to safely hold your battery in storage compartments. The double battery box features a positive and negative battery terminal with 3/8" studs. Product measures Standard: 14-7/8" x 9-5/8" x 11-3/4" (including vent ports), and 14-7/8" x 9-5/8" x 10-1/4" (excluding vent ports). Double: 17-5/8" x 15-1/4" x 13-7/8" (including vent ports); 17-5/8" x 15-1/2" x 11-7/8" (excluding vent ports). Includes: (1) battery box, (2) battery terminals, (1) hose, (1) hose mount plate, (1) louvered vent grille, foam tape, putty tape, (2) hose clamps, and mounting hardware. Meets U.S. Coast Guard CFR 183.420 and ABYC E-10.7 specifications.