TORK 25" Sta-Rite System 3 S8S70 Filter Tank O-Ring Rebuild Kit 24850-0009 Sta-rite System 3 S8S70 Cartridge Filter O-ring Kit Includes: 5, 23, 14, 15, 11, 12, as shown in diagram, These are Quality TORK replacement o-rings This fits the 25" tank Only