This Attwood Heavy-Duty Adjustable Battery Tray reliably and securely holds a 27 Series battery, and it is height-adjustable between 7 inches and 9.5 inches to accommodate taller batteries. This heavy-duty, non-corrosive, black plastic tray comes with an adjustable-height crossbar and 2 retaining bolts. It contains no metal parts that could corrode, and no webbing straps to fade. Its ergonomic nuts and bolts make it easy to secure a battery in place. This tray is intended for use with 27 Series batteries: 27, 27M, and 27F. Its inside dimensions are 12 1/8 inches x 6 ¾ inches. It meet ABYC Standard E-10 and USCG requirements. Attwood Corporation has been an award-winning leader in engineering, testing, and manufacturing the highest quality marine products for over 100 years. We deliver safe and reliable lighting, fuel systems, water systems, seating & pedestals, swim ladders, custom upholstery, and general marine accessories that are easy to install and meet regulatory compliance.