The Half Round Euro Copper Gutter profiles are available in 4, 5, 6, and 7.56 sizes. They are made from heavy gauge, 18 oz. and 20.44 oz. copper. They're also available in 18.04 ft. lengths. All the gutters, downspouts and accessories are made in metric sizes; therefore, don't fit our standard half round gutter accessories. Please Note: The European Gutter System is only compatible with European Gutter Accessories.