Trunk Battery Hold Down Compatible with Most Car and Truck batteries including the following optima sizes: * Red top: 34, 34R, 34/78 * Yellow top: D34, * Blue top: 34M, D34M Feature: * Overall dimensions of the base plate are 11.15" long by 8.43" wide. * Battery tray fits batteries up to 10.5" L x 6.95" W x 6.7" H with provided thread sleeves. * Longer 3/8-16 full-thread required if batteries length exceeds 7.4 inches * The Optima battery can be placed on the tray steadily. * Once the clamps are torqued the battery will not move at all. * Made of High Performence alloy aluminum.Anti-rust and prevent from corrosion. Ensures long-lasting reliable performance. Package Includes: * 1 x base plate * 1 x top plate * 3 x all-thread hold downs and nuts * 3 x thread sleeves