Battery box is made of polypropylene construction for total acid resistance. Hold-down strap resist 350 pounds of force, nearly four times the USCG requirement. No mounting hardware is included with white models. Battery boxes meet ABYC standard E-10 and U.S. coast guard specification number 183.420 as an OEM-installed battery hold-down system. Drop tested in temperatures ranging from -20°F to +120°F. Mounting hardware included. Use with 24/24M battery series (10-1/8" maximum height), Inside dimensions: 11-1/8" (L) x 7-3/4" (W) x 10-1/8" (H), Outside dimensions: 14" (L) x 9-5/8" (W) x 10-5/8" (H), 40” strap length, 4 cable openings, enlarged to .55"-diameter, larger handles with rolled edges, instructions molded inside cover, black and vented.