M&M Boys fuel tanks are designed and built by demo drivers to withstand the rigors of a demolition derby. We use our products in our own derby cars. All of our stainless steel tanks are fabricated from 12 ga stainless steel. We use standard smooth finish 304 stainless steel. All components of our stainless tanks are stainless, fittings, feet, fill pipe and cap, and the wire used to weld them together. Wire feed welded, with stainless wire, by our hands. Pressure tested for leaks. There are 4 mounting pads, which fit a 3/8" bolt in each pad, for a secure hold. Our stainless tanks come standard with 2 - 3/8"ID threaded stainless female fittings. As seen in the photo, the bottom fitting is used for the feed line and the top fitting is used for the vent. We recommend you use a vent topper, roll over valve, sold seperately. These tanks come with or without a return line fitting, please specify. Most 80's and newer cars require a return line for excess fuel to drain back into the tank, old iron cars do not. This tank holds approx. 10 gallons. Tank dimensions are 14" long x 14" wide x 12" high. Overall dimensions 18" long x 14" wide x 15" high. Shipping weight is 40lbs.