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Continue to ChatJOUCOMATIC 43500309 - 20mm Bore, 25mm Stroke, Double Acting, Double Acting, Series 435 Isoclair Round Cylinders (Type C) https://www.valves-direct.com/product/joucomatic-43500309-20mm-bore-25mm-stroke-double-acting-double-acting-series-435-isoclair-round-cylinders-type-c/