Key Specifications / Parameters Part Number: 29A9221X012 Product Type: Gasket, spiral‑wound, metallic (metal wound + filler) Material: Metal wound (Monel) with silver plating or finish Intended Application: Seat ring or body flange sealing in Fisher EH/EHT series valves for high pressure (Class 2500) service Fitment Example: For 8″ Class 2500 size valves (as listed in aftermarket listings) Description Detail: “Gasket, Monel/Silver Plated, 8″ CL 2500 Type EH” per aftermarket supplier listing