Du-Bro Standard and Large Clunks are now available separately. Our Clunks weigh 7.5 grams / 0.26 oz. (Standard), 13.6 grams / 0.48 oz. (Large) and are Nickel Plated to prevent corrosion. Fuel Line Barbs are machined right in Clunk to grip your fuel lines securely. 1/pkg.