Description Dreamworks HighFlow Heavy Clunk Features Stainless Steel Construction w/Chemical-Resistant Viton O-Ring. Overlength: 1.5″, 38mm. Body: 1″, 25mm. Barb .5″, 12mm. Diameter: .45″, 11.6mm Weight: 19.7 Grams. For use with HighFlow 3/16″ Tygon, or 8mm Tubing. Fits Standard Fuel Tank Foward Fittings.