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Continue to ChatASCO NKB551A438 - G1/4, 5/3 Stainless Steel Solenoid, W1 Pressure Held, Air Pilot Operated & Return https://www.valves-direct.com/product/asco-nkb551a438-g1-4-5-3-stainless-steel-solenoid-w1-pressure-held-air-pilot-operated-return/