Ribbed Pond Hose 78 Foot x Half Inch Inner Diameter 1/2 Inch Diameter or (12mm) Quality Standard Metric Pond Hose 168 Feet (50m) Length Coiled Roll Will not Kink and UV stabilized Easy to use. Will Fit all Metric Applications like Hagen, Tetra, Fishmate, Oase Water Garden, Koi Fish Pond, and Aquatic Plant Safe