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Continue to ChatTDR-FSS-F-1D-N/06-110A - 110V AC, Double Key, 3NO/3NC, Stainless Steel, Castell TDR Time Delay Unit With Electrical Isolation https://www.concretespares.ie/product/tdr-fss-f-1d-n-06-110a-110v-ac-double-key-3no-3nc-stainless-steel-castell-tdr-time-delay-unit-with-electrical-isolation/