This is our Optima "Red Top" billet battery box. We designed this box to securely clamp your optima red top battery for solid performance. You spent alot of money on your optima so show it off! We use solid 6061 aircraft grade billet aluminum for all our products. 4 Grade 8 Flat head screws for side clamps are included, base plate is drilled and counter sunk for 1/4 inch flat heads. We offer red, blue, lime green, white, purple, smoked chrome, chrome, yellow, and orange powdercoat. The picture shows chrome powdercoat.