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Continue to ChatTDR-QB-F-1S-N/06-110A - 110V AC, Exchange Key, 3NO/3NC, Brass, Castell TDR Time Delay Remote Unit with Electrical Isolation https://www.pneutrol.com/industrialspares/product/tdr-qb-f-1s-n-06-110a-110v-ac-exchange-key-3no-3nc-brass-castell-tdr-time-delay-remote-unit-with-electrical-isolation/