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Continue to ChatJOUCOMATIC 97801421 - 80mm Bore, Trinorm, Piston Seal + Rod Seals, High Temperature, Spare Part Kit for Series 436/437 Cylinders https://www.valves-direct.com/product/joucomatic-97801421-80mm-bore-trinorm-piston-seal-rod-seals-high-temperature-spare-part-kit-for-series-436-437-cylinders/