These battery boxes are machined out of 6061-T6 aluminum and are available polished or Fusioncoated. They give you the ultimate look for your engine compartment. Available for group 24 & 27 batteries, they come complete with stainless steel fasteners and polished aluminum standoffs.Boxes are for batteries with the following dimensions:Group 24- 10 3/4"L X 6 3/4"WGroup 27- 12"L X 6 3/4"W