Used by leading boat builders br Individually tested for quality assurance br State-of-the-art construction br Manufactured from marine-grade cross-linked polyethylene material, these durable below-deck tanks meet and exceed all industry standards. Moeller permanent fuel tanks are equipped with a Stewart Warner electric sending unit, a 1/4" NPT aluminum withdrawal, and a barbed vent. Not for use with diesel fuel. Please allow 2-1/2" for fittings. Add the optional hold down kit (#20361) br br Tank capacity: 20 gallons. Dimensions: 11.75"W x 26"L x 16.25"D.