Maxx Flex 3/4" x 50' HydroMaxx Black Metric Non Kink Corrugated PVC Water Garden Pond Hose and Tubing Very flexible - ideal for working in confined areas. Reduces the number of required fittings and permits the installer/user to make smooth, tight turns. Mildew, sun, ozone (UV) and chemical resistant. Smooth inside - permits unrestricted flow, reducing operating costs. Inhibits algae growth Designed for use with barbed or insert fittings and appropriate clamps.