Intex Krystal Clear 1900 Gallon per Hour Wet Set Filter Pump．
Fits All 18 Ft and 24 Ft Diameter Intex Easy Set Pools and Frame Set Pools as well as all pools using 1.5" diameter hoses and can be used with smaller pools with the use of an adaptor.
Pumps are double insulated, install easily and have an air release valve. Pump for 18'20'24' round framed pool pumps 1,900 gallons per hour.
For best results, replace pump filter every 2 weeks.
This pump is also the replacement for Krystal Klear Models 635, 51, 520 and 520R