Attwood Battery Box With Strap And Mounting Hardware Attwood vented battery boxes meet ABYC Standard E-10 and US Coast Guard Specification Number 183.420 as an OEM-installed battery hold down system. Features polypropylene construction for total acid resistance. The hold-down straps resist 350 lbs. of force, nearly four times the USCG requirement. Battery boxes are drop tested in temperatures ranging from -20 F to 120 F. Features 4 cable openings, enlarged to .55 diameter Larger handles with rol