Guardian Pool Spa Filter Replacement For Unicel C-8326, Filbur FC-2780, Pleatco PSD125-2000 REPLACEMENT FOR, COMPATIBLE WITH - Most inground and above ground swimming pools, hot tubs, and spas. EXPANSIVE FLOW CORE - Specially moulded design allows higher water access to filtration fabric, reducing overall pump stress. BREAK-RESISTANT BANDING - Guardian banding prevents cartridge malfunction due to normal wear & tear. ANTIMICROBIAL END CAPS - Inhibit bacterial growth for optimal performance to deliver crystal clear water. HIGH QUALITY FILTRATION FABRIC - Engineered for durability and high dirt-holding capacity, this filter stands strong under pressure and holds up to the rigours of multiple cleanings.