Battery trays for 24, 27 and group 29/31 batteries Heavy-duty, non-corrosive black plastic Includes adjustable-height crossbar and two retaining bolts Meets ABYC Standard E-10 and U.S. Coast Guard requirements Install with #10 screws ATT 9090-5 - L: 10-5/8" x W: 6-3/4" x H: 8-3/4" ATT 9091-5 - L: 12-1/8" x W: 6-3/4" x H: 8-1/4" ATT 9094-5 L: 13-1/8" x W: 6-7/8"