TH Marine BHF-27S-DP Frame Top Battery Tray fits 27 Series Battery Frame Top Holds Batteries Securely with Easy Adjust Knobs Thick Base Holds Heaviest Batteries Recessed Fasteners and Stainless Steel Rods Resist Corrosion Fits Series 27 Batteries Group 27 Series Dimensions, Length OD: 14-3/8", Length ID: 11-7/8", Width OD: 7-1/2", Width ID: 6-3/4", Min/Max Battery Height: 6-1/2" - 8"