The Noco HM318 Snap-Top Battery Box is a battery storage solution for battery sizes 24 to 27. It features locking tabs to securely attach the lid to the battery box, reinforced plastic handles to prevent cracking during transportation. This robust battery box maintains its impact properties down to minus 30 . Perfect installation in a car, boat, camper, motorhome, RV, trailer or caravan. Internal dimensions: 355 180 243 External dimensions: 447 254 272 Designed for group 24 - 27 battery. Locking tabs to securely attach the cover to the battery case. Impact and UV resistant, plus strong carrying handles. Fully ventilated to safely release battery gases. Meets Coast Guard (USCG) Code of Federal Regulations 183.420. Meets American Boat and Yacht Council (ABYC) E-10.7.