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Continue to ChatJOUCOMATIC 43900209 - 63mm Bore, Rear Trunnion Not ISO Standard, Series 438 Isoclair Round Cylinder (Type CIS) https://www.valves-direct.com/product/joucomatic-43900209-63mm-bore-rear-trunnion-not-iso-standard-series-438-isoclair-round-cylinder-type-cis/