Vented battery box for standard size, Series 24 batteries(10-1/8" max. height). Meet the ABYC standard E-10 and U.S. Coast Guard Specification Number 183.420 as an OEM-installed battery hold-down system. Polypropylene construction for total acid resistance. Hold-down straps resist 350 lbs. of force, nearly four times the USCG requirement. Drop tested in temperatures ranging from -20 degrees F to 120 degrees F. Mounting hardware included.