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Continue to ChatJOUCOMATIC 449502020020 - 20mm Bore, 20mm Stroke, Double Acting, PEC20NAF0020DM, Series 449 Compact Cylinders (Type PEC) https://www.valves-direct.com/product/joucomatic-449502020020-20mm-bore-20mm-stroke-double-acting-pec20naf0020dm-series-449-compact-cylinders-type-pec/