Poolmaster 13064 Replacement Filter Cartridge for Predator-100 59054200 Filter The corresponding Pleatco number is PAP100-4 and the corresponding Unicel number is C-9410 The top of the replacement filter cartridge is open 6 soft and the bottom is open 6 soft 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