Poolmaster 12302 Replacement Filter Cartridge for Dream Maker Spas Filter Equivalent to the following replacement filter cartridges; Pleatco PDM25 and Unicel N/A The top of the replacement filter cartridge is handle and the bottom is open 1-7/8 Break-resistant bands keep pleats separated for greater flow, filtration and add longer life to cartridge High quality spun bonded polyester material for exceptional water filtration Premium grade polyurethane and plastisol end caps