Poolmaster 12900 Replacement Filter Cartridge for Series C-751 CX760-RE Filter Equivalent to the following replacement filter cartridges; Pleatco PA76-4and Unicel C-8411 The top of the replacement filter cartridge is open 4 with molded gasket and the bottom is open 4 with molded gasket 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