Check the listing for details. 192323 O-Ring for Pentair PacFab FNS, Nautilus DE Filter (3 Pack). Color: Black, Condition: New. Listed at 9.99 USD. 192323 O-Ring for Pentair PacFab FNS, Nautilus DE Filter (3 Pack) Product Features: O-Ring Part Number: 192323 (3 Pack) Compatible with Pentair PacFab FNS (FNS24, FNS36, FNS48, FNS60) DE Filter, Nautilus (NS24, NS36, NS48, NS60, NS72) DE Filter, Nautilus Plus (NSP-24, NSP-36, NSP-48, NSP-60, NSP-72) DE Filter, select Bermuda Skimmers, and select Hydropump pool/spa pumps. Approximate o-ring size for part number 192323: 2.18” (about 2-3/16”) inside diameter, 2.39” (just over 2-3/8”), 0.100” (just over 3/32”) thickness. Package contains three (3) o-rings (also called gaskets or seals). Molded from OEM spec synthetic rubber for long lasting performance and durability. Manufactured and warrantied by Captain O-Ring LLC. Proudly assembled in the USA! Get your pool equipment back in working order with Captain O-Ring’s replacement 192323 o-rings. The 192323 o-ring is compatbile with Pentair PacFab FNS (FNS24, FNS36, FNS48, FNS60) DE Filter, Nautilus (NS24, NS36, NS48, NS60, NS72) DE Filter, Nautilus Plus (NSP-24, NSP-36, NSP-48, NSP-60, NSP-72) DE Filter, Bermuda Skimmers, and select Hydropump pool/spa pumps. Check your system’s user manual and parts diagram to confirm you are looking for o-ring part number 192323 to ensure you are ordering the correct o-ring size. Approximate o-ring size for part number 192323: 2.18” (about 2-3/16”) inside diameter, 2.39” (just over 2-3/8”), 0.100” (just over 3/32”) thickness Package contains three (3) o-rings (also called gaskets or seals). Manufactured and warrantied by Captain O-Ring LLC. Proudly assembled in the USA!