Quantity?DIMENSIONS?Contains 1 filter cartridge, Length:28 9/16 "; Outside Diameter:7 1/4 "; Top:3 "; Bottom:3 "; ?PERFECT FITMENT?Summer PooL Spa Filter Replacement for Spa Filter UNICEL C-7303, PLEATCO PAE150, FILBUR FC-6325 , Get purer, cleaner water in your pool or spa with these replacement cartridge filters ?High quality and durable material?PET polyester shaped silk non-woven fabric thickened trilobal fabric can filter 99% of contaminants, good filtration, strong end caps,High-pressure-bearing end caps with durable materials resist chlorine degradation and provide support for the filter material, will work more efficiently and last longer. ?Powerful Filtration Performance?The filter with thickened trilobal fabric, heavy chlorine and break resistant end caps and reinforced center support can block hair, leaves, dust, accumulation, sand, rust, algae, colloids, and other large particle impurities, clean and high quality water to enjoy a good leisure spa time ?Easy Installation, Easy clean, Reusable?Regular cleaning Pool Filter Cartridge to ensure better water quality and a better working pump.No flakes, no deformation, can bear high pressure.the filter also needs to be replaced regularly to make your pool filter work more efficiently.