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Continue to ChatNUMATICS M4315081944N001 - 40mm Bore, PTFE Detachable Rod Scraper Seal Cartridge, Series 431 Anti Corrosive Cylinders https://www.valves-direct.com/product/numatics-m4315081944n001-40mm-bore-ptfe-detachable-rod-scraper-seal-cartridge-series-431-anti-corrosive-cylinders/