Rosedale continuous-wound cartridge elements come in a wide range of materials, lengths, and micron retention ratings. A highly innovative single-core design is used, eliminating the “joints” common in other manufacturers’ elements at 10″ intervals. Materials of these elements include cotton, nylon, glass, and polypropylene. Their lengths range from 9-3/4 inches to 40 inches, fitting most cartridge housings in the field. Micron retention ratings are from 200 down to 0.5 microns. These elements offer true depth filtration, higher efficiency, lower pressure-drop, and greater solids-holding capacity than standard water filtration elements at competitive prices.