Brand: Aeromotive Manufacturer's Part Number: 18720 Part Type: Fuel Tank Caps Product Line: Aeromotive Fuel Tank Caps Automotive Fittings Part Number: AEI-18720 UPC: 684980014907 Fuel Tank Cap Material: Aluminum Fuel Tank Cap Color: Black Quantity: Sold individually. Description: Aeromotive fuel tank caps are perfect for custom fuel cells. The caps are made from billet aluminum, CNC-machined from 6065-T6 to insure durability and longevity and are available in different styles, sizes, and finishes, so you can choose the best application option that is better suited to your needs.