This is a reusable pool filter that is cleanable and washable will replace standard Type A/C replaceable cartridges used in popular backyard above-ground pools and others. This patented design is unique to the industry and pays for itself in weeks! This particular filter is compatible with skimmer type filter pump systems. Stop throwing money away on replaceable pool filter cartridges when you can re-use an OrcaFilter with Patented PureBlue Technology. An OrcaFilter will outlast your pool! These filters are also compatible with many other pump models that take A/C. Filter is provided with 3 gaskets to enable fit into existing pump housings, filter screen, and ozone/UV-resistant bands for fixing the filter screen to the filter housing. Orca Filters LLC is a veteran-owned business and our products are Made in the USA so you are creating American jobs when you buy our products. Our product is also completely green and results in no used filters being sent to the landfill - Go Green, Go Orca. That's why we say its "The Last Filter You'll Ever Buy".