Ruichen Materials K-shaped aluminum gutter water system for its hyperbolic appearance, long life, easy to install, and other advantages been widely used in the United States and Canada. According to AAMA (American Builders Association) statistics, over 90 percent of US households use K-shaped aluminum gutter water system. 5 inches K-shaped gutter water system is mainly used for houses and small businesses (public) buildings. 6 inches, 7 inches K-shaped gutter water system is mainly used for villas, multi-storey apartment and medium-sized businesses (public) buildings. Color multi-curve design: gutter cross-section of North America's most popular K-Snap multi-curve, the water pipe is used with a corrugated rectangular compact design; high cost: the force components of metal products, a substantial increase in security forces, and configure more less an overall reduction in the total cost, more cost-effective; easy to learn and easy to install: small parts, installation learn, natural and reliable connection between the parts;