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Continue to ChatNUMATICS G438B52K0050A00 - 50mm Bore, 50mm Stroke, G1/4, Through Rod Double Acting, Series G438 Round Cylinders ISO 6431 https://www.valves-direct.com/product/numatics-g438b52k0050a00-50mm-bore-50mm-stroke-g1-4-through-rod-double-acting-series-g438-round-cylinders-iso-6431/