Dual 8D Commercial Grade Battery Box The HM485 Commercial Battery Box is a battery storage solution for sizes dual group 8D batteries, including Marine, RV and Commercial equipment. It features a four corner fastening system and captive lid for easy installations, large cable entry holes for heavy gauge wires, full flow ventilation for releasing battery gasses, and a large battery acid reservoir. Its rugged, rotationally molded design provides ultimate protection in low-temperature environments and protects against UV, oil, gas and other contaminants. Perfect installation in a boat, camper, motorhome, trailer, or caravan, as well as, commercial and generator equipment. • Designed for a dual group 8D batteries. • A four-corner fastening system for easy installation. • Large cable entry holes for heavy gauge wires (up to 4/0 AWG). • Large internal reservoir to collect battery acid. • Rugged, rotationally molded design for extreme conditions. • Meets Coast Guard (USCG) Code of Federal Regulations 183.420. • Meets American Boat and Yacht Council (ABYC) E-10.7. • What's Included: Dual Group 8D Battery Box and Fastening Knobs Specifications • Battery Size: Dual Group 8D • Internal Dimensions: 21.0" L x 23.0” W x 10.6” H • External Dimensions: 26.4” L x 24.4” W x 12.5” H • Product Weight: 16.40 Pounds