Spend more time enjoying your pool with peace of mind knowing you have the 36-pack of Intex Pool Easy Set Type B Replacement Filter Cartridges, keeping it cleaner and more transparent than ever all season long. Constructed out of high-quality Dacron paper materials, these filter cartridges were designed to keep your Intex or other compatible filter pumps running longer and stronger. These filter cartridges are easy to clean and can simply be replaced every 2 weeks for peak performance and maximum efficiency. By installing these filter cartridges in your above-ground outdoor pool, you're ensuring clean, sparkling water that your friends and family will love swimming in.