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Continue to ChatASCO WPG553A402MO - 3/2 NC, 5/2, G1/2, Bi-Stable, Return, Series 551 552 553 - ASCO Pilot Operated NAMUR Spool Valves https://www.valves-direct.com/product/asco-wpg553a402mo-3-2-nc-5-2-g1-2-bi-stable-return-series-551-552-553-asco-pilot-operated-namur-spool-valves/