Billet Aluminum Optima Battery Tray – Black W/ 5.0 Logo. This billet battery tray is CNC machined from high grade billet aluminum, specifically designed for your 4-post Optima Battery. Featuring a Laser Etched Design logo & powder coated matte black finish. These trays are for the Group 34 Batteries. Fits Optima Batteries, Group 34/78, 4 Post Blue, Red & Yellow Tops. Billet Aluminum CNC Machined. Plain Top Design with 5.0 Logo – Laser Etched. Inside Dimensions for Battery: 9-11/16″ Long x 6-5/8″ x 6-7/8 Tall. Overall Outside Dimensions: 11-1/2″ Long x 7-3/4″ Wide x 7-1/4 Tall. 5.5 Base Mounting Bolt Holes Center to Center. Kit Includes Base, Posts and Top.