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Continue to ChatJOUCOMATIC 435500290050 - 20mm Bore, 50mm Stroke, Through Rod, Double Acting, Series 435 Isoclair Round Cylinders (Type C) https://www.valves-direct.com/product/joucomatic-435500290050-20mm-bore-50mm-stroke-through-rod-double-acting-series-435-isoclair-round-cylinders-type-c/