Attwood Large Battery BoxAttwood Large Battery Box is a vented black battery box for larger applications (9-3/4" maximum battery height). Constructed of polypropylene for total acid resistance. Hold-down straps resist 350 lbs of force, nearly four times the USCG requirement. Attwood Battery Boxes are drop tested in temperatures ranging from -20F to +120F.Attwood Battery Boxes meet ABYC Standard E-10 and U.S. Coast Guard Specification Number 183.420 as an OEM-installed battery hold-down system.Mounting hardware included. Inside Dimensions w/ Lid: Height: 9-3/4"; Width: 7-1/8"; Length: 15-7/16"; Outside Dimensions w/ Lid Height: 10-1/4"; Width: 9-1/4"; Length: 18-3/4" ;