Stock up now with the six pack 59900e-6 type a intex replacement filter cartridge. Just the equipment you need to easily take care of your pool. Filter the water in your pool to keep it attractive and refreshed all season long. Easy to clean dacron filter material. Shrink wrapped with litho label. Replace cartridge every two weeks. For filter pump item#58603e/56637e/56635e pumps. Easy to change.