Extension Tube with Strainer Replacement for Dynaflo 3/30 Filter Cartridge Non-kink tubing provides the strength and flexibility required in a variety of pond applications Fits DynaFlo 3/30 filter cartridge The tubes can be snapped onto other tubes to provide deeper reach This product weighs 0.02-pound Measures 1-inch length by 9-1/2-inch height by 4-inch width