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Continue to ChatNUMATICS P493A4126200A00 - 40mm Bore, Rectangular Front (MF1) Or Rear Flange (MF2), Series 493 Standardised Mountings https://www.valves-direct.com/product/numatics-p493a4126200a00-40mm-bore-rectangular-front-mf1-or-rear-flange-mf2-series-493-standardised-mountings/