Keep your pool performing at its best by investing in this 12 pack of Intex Pool Easy Set Type A Replacement Filter Cartridges. Constructed out of 13.5 square feet of high quality Dacron, this filter cartridge was designed to keep your Intex or other compatible filter pumps running longer and stronger. Replace this filter cartridge every 2 weeks for peak performance. For the long healthy life of your pool, invest in this quality Intex Pool Easy Set Type A Replacement Filter Cartridge and let it go to work for you.