Poolmaster 12875 Replacement Filter Cartridge for Trimline CC-75 62044 Filter The corresponding Pleatco number is PWC75 and the corresponding Unicel number is C-7478 The top of the replacement filter cartridge is 3-1/16 open with step and the bottom is 3-1/16 open with step 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