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Continue to ChatJOUCOMATIC 43500084 - 12mm Bore, 50mm Stroke, Single Acting, Series 435 Isoclair Round Cylinders (Type C) https://www.valves-direct.com/product/joucomatic-43500084-12mm-bore-50mm-stroke-single-acting-series-435-isoclair-round-cylinders-type-c/