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Continue to ChatJOUCOMATIC 43600414 - 40mm Bore, 50mm Stroke, PIS40A50DM, Series 436 Heavy Duty Cylinders (Type PIS) https://www.valves-direct.com/product/joucomatic-43600414-40mm-bore-50mm-stroke-pis40a50dm-series-436-heavy-duty-cylinders-type-pis/