Designed to securely mount your battery in your vehicle using sturdy base plates and hold-down plates. Includes heavy-duty 3/8'' hardware for enhanced durability. Compatible with most car and truck batteries, including various Optima sizes. Bottom tray accepts batteries up to 10.5'' length x 6.95'' width x 6.7'' height with provided thread sleeves. Overall dimensions of the base plate are 11.25'' long by 8.5'' wide; batteries over 7.4'' tall will require longer 3/8-16 all-thread. This battery tray is designed to securely mount your battery in your vehicle using sturdy base plates and hold-down plates and includes heavy-duty 3/8'' hardware. Compatible with most car and truck batteries including the following Optima sizes: Red top: 34, 34R, 34/78; Yellow top: D34, D34/78; Blue top: 34M, D34M (may fit other Optima battery sizes). Includes: 1 Base Plate, 1 Top Plate, 3 All-Thread Hold Downs & Nuts, 3 Thread Sleeves. Color: Black Material: Aluminum Alloy Package Contents: 1xUniversal Billet Battery Tray Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.