Barnes 4WD Dual Optima Group 34/78 Battery Box is a great solution to keep your batteries secure even in the roughest terrain! Our battery boxes are laser cut from 11-Gauge steel and bent right here in-house. Designed for a snug fit around the common Red-Top, Yellow-Top 34/78 and Blue Top 34 Optima Batteries. Easily mount the battery box with the provided 18-8 Stainless Steel 10-24 countersunk bolts, washers, and nylock buts or use the provided holes in the bottom as welding points. Each box comes with (4) 18-8 Stainless Steel 5/16 x 1 inch bolts and nylock nuts to keep your batteries secured in the box. The battery box top and bottom with be shipped as bare steel and will need to be painted or powder coated.