Laguna PowerFlo Underwater Mechanical/Biological Round Filter for PowerJet Pump Reversible argyle raincoat Clean/healthy pond water and a significant reduction in the frequency of clogging in water pumps and fountain heads A large surface area is designed for superior filtering capacity Fits PowerJet PT405, PT406, PT410, PT411, PT412, PT413 pump models Filter measures 19-inch diameter and 4-1/2-inch height