Profile: Eagle Fuel Cells, Inc. specializes in offering fuel cells. Bladder fuel cells are an assembly of flexible fuel resistant polymers, fabric materials, metal items and fittings. A cross section of a fuel cell wall construction consists of a fuel resistant polymer such as liquefied nylon, neoprene & buna-N laminated to a fabric substrate which provides structural support and puncture resistance. We provide stainless steel fuel drain valve kits. The kit protects the fragile rubber drain nipple from weather and wear & tear.