Poolmaster 13232 Replacement Filter Cartridge for Clearwater II 200 817-0200N Filter The corresponding Pleatco number is PWWCT200and the corresponding Unicel number is C-8419 The top of the replacement filter cartridge is open 4 molded gasket and the bottom is open 4 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