Generic 90-423-5139 2.1875" ID 0.094" Cross Section Buna-N O-Ring Specification: Application - Category: Filter, Cartridge, Filter, DE, Pump, Pool Application Manufacturer: American Products/Pentair, Hayward, PacFab/Pentair Application Model: Earthworks EW100, Earthworks EW125, Earthworks EW150, Earthworks EW75, FNS Plus 24, FNS Plus 36, FNS Plus 48, FNS Plus 60, FNS Polymeric 24, FNS Polymeric 36, FNS Polymeric 48, FNS Polymeric 60, Hydro Pump, Micro-Clear Vertical Grid, Micro-Clear Vertical Grid SS Tank, Nautilus NS24, Nautilus NS36, Nautilus NS48, Nautilus NS60, Nautilus NS72, Nautilus Plus NS24, Nautilus Plus NS36, Nautilus Plus NS48, Nautilus Plus NS60, Nautilus Plus NS72, Pro-Grid Vertical Grid Permaglass XL, Sea Horse FSH Fiberglass Tank, Sea Horse SS Tank, Titan CM Composite Tank, Titan SS Tank Application - Part: Collector Manifold/Outlet Elbow, Manifold Assy, Plug, Pot to Volute, Standpipe Assy Manufacturer Part Number: 192323, 47013909R000, 59000600, DEX2400Z5 AS568 Number: 139 O Reference Number: O-24 O-Ring Inside Diameter: 2-3/16" O-Ring Cross Section: 3/32"