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Continue to ChatNUMATICS 43900150 - 12-16mm Bore, Front Neck Nut MR3, Series 435 Isoclair Round Cylinder (Type C) https://www.valves-direct.com/product/numatics-43900150-12-16mm-bore-front-neck-nut-mr3-series-435-isoclair-round-cylinder-type-c/