Attwood- Battery Hold Down TrayBattery Tray, For Use With 27 27M Series Battery, Low Profile, Non Corrosive, Black, Plastic, 12 5 8 Inch Length x 6 3 4 Inch Width x 8 1 4 Inch Height Inside Dimensions, ABYC Standard E 10 And U. S. Coast Guard Approved, With Adjustable Height Crossbar And Two Retaining Bolts, Aftermarket Packaging Heavy Duty, Non Corrosive Black Plastic Patented Design Features Adjustable Height Crossbar And Two Retaining Bolts ABYC Standard E 10 And U. S. Coast