Attwood Heavy Duty Adjustable Battery TrayAttwood Heavy Duty Adjustable Battery Trays are made of heavy-duty, non-corrosive, black plastic. These trays can extend up to 9-1/2", making it ideal for trailer batteries. Contains no metal parts to corrode and no webbing straps to fade. Includes adjustable-height crossbar and (2) retaining bolts. Ergonomic nuts and bolts easily secure batteries.Meets ABYC Standard E-10 and USCG requirementsDescriptionInside Dimensions Battery Series 24 Series Battery Tray 10-5/8" x 6-3/4" 24/24M/24F 27 Series Battery Tray 12-1/8" x 6-3/4" 27/27M/27F