roup 24-31 Snap-Top Battery Box BRAND NEW BATTERY BOX  Technical Specifications. What's Included Battery Box, 42-Inch Strap with Mounting Hardware Battery Size Group 24 - Group 31 Internal Dimensions 14.0" L x 7.1" W x 9.6" H External Dimensions 17.6" L x 10.0" W x 10.7" H The HM318BKS Snap-Top Battery Box is designed for Group 24-31 automotive, marine and deep cycle batteries. It features locking tabs to securely fasten the lid to the base, reinforced handles to prevent cracking during relocation, and allows adequate ventilation of battery acid vapors. A rugged design that is impact resistant down to minus 20°F, as well as, protects against UV, oil, gas and other contaminants. And it meets USCG Code of Federal Regulations 183.420 and ABYC E-10.7 specification.