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Continue to ChatJOUCOMATIC 449502040020 - 40mm Bore, 20mm Stroke, Double Acting, PEC40NAF0020DM, Series 449 Compact Cylinders (Type PEC) https://www.valves-direct.com/product/joucomatic-449502040020-40mm-bore-20mm-stroke-double-acting-pec40naf0020dm-series-449-compact-cylinders-type-pec/