Injection molded polypropylene plastic boxes effectively collect battery electrolyte, allow ventilation, and prevent accidental contact of ungrounded battery terminals. Patented Snap-Top™ lid secures the lid to the base, heavy-duty handles resist cracking, and vent hole cover plugs limit water entry. Includes mounting hardware and instructions. Fits 12 Volt batteries. Large box fits Group 24-31 batteries. Dimension: Inside (14.50”L x 7.87”W x 10.00”H), Outside (17.75”L x 10.13”W x 10.50”H)