Hayward SX200Z4 O-ring Replacement for Select Hayward Filter and Valve O-ring replacement Fits hayward pro-grid, micro-clear vertical grid d.e. filter and pro plus series models s311sx, s311sxv, s360sx Also fits pro series s210s, s244s, s310s and sand filter series s240 Also compatible with Hayward Super Star-Clear Cartridge filter series C2000, C3000, C4000, C5000 and Multiport valve SP0410X, SP0740DE, SP1078 Weighs 3.6-pound