The NOCO HM318BKS snap-top battery box is designed for automotive, marine, and RV batteries for group 24-31 sized batteries. It features patented locking tabs to fasten the lid to the base securely and an adjustable divider to accommodate various group sizes. Its designed to limit battery movement and protect against accidental shorting of battery terminals, as well as, collect battery acid and allow adequate ventilation. It maintains it impact properties down to minus 20 degrees Fahrenheit, and unaffected by acid, gas, oil, as well as, UV exposure. And it's certified and tested to meet United States Coast guard (USCG) code Of Federal regulations 183. 420, American boat and yacht Council (ABYC) E-10. 7 specifications, and frustration-free packaging. other search terms include: battery box, battery box 12V, battery box marine, marine battery box, battery box RV, RV battery box, battery box boat, boat battery box, battery box vent, battery box with vent, battery box for boat, battery box for camper, battery box 24, battery box group 24, battery box 27, battery box group 27, battery box 31, and battery box group 31.