The Custom Molded Products 50 Sq Feet Skim Filter simplifies pool care a little bit. It acts as both a skimmer and a filter. Water enters the unit through the top and gets filtered before it goes out the other end. The Skim Filter requires a minimum hole size of 6.5" to fit. It holds a 50 Sq Ft cartridge inside and has 2" plumbing connections. It also uses an internal bypass valve. Additionally, the skim filter comes with a gasket and a lower locking ring to keep the body secure, especially while it is being used. For more information on this and other products contact the pros at PoguePoolSpa.com.