Hayward CAX-20256 1/4-Inch Inline Strainer Replacement for Select Hayward Cat 1000 Monitors 1/4-inch inline strainer Fits hayward cat 1000 automated controller monitor models cat-1000-co2, cat-1000-co2-ul, cat-1000-orp, cat-1000-orp-ul, cat-1000-ph Also fits hayward cat 1000 automated controller monitor models cat-1000-ph-ul, cat-1000-ptc, cat-1000-ptc-ul, cat-1000orpptc, cat1000orpptcul Weighs 0.2 pounds