Poolmaster 12901 Replacement Filter Cartridge for Series C-751 CX760-RE Filter The corresponding Pleatco number is PA76-Mand the corresponding Unicel number is 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