This strainer cover is designed to use with Hayward Power-Flo Matrix SP1590 pump series models SP1591, SP1592, SP1592FT, SP1593 and also compatible with Hayward XStream Cartridge and Perflex extended cycle D.E filter models CC10093STUFFT, EC50C92SFTTL, EC50C93STL. Also compatible with Hayward Pro and VL series sand filter model S210T93SFT. Includes lock ring and o-ring; weighs 13.2-pound.