Complies with NHRA Rule 8:1. Required by NHRA when there is no firewall between driver's compartment and battery. Fits most battery sizes. Embossed Taylor logo in lid. 3 piece .040" aluminum box design allows access without removing the battery from the box. Hard mounts battery to the frame with supplied 3/8" bolts. Heavy duty one-piece welded battery hold down and mounting hardware included. Dimensions: 13.5" long x 9.5" wide x 10" high.