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Continue to ChatKS20-FSB-F-C/O4 - CASTELL 20A, BRASS, NO/NC, FRONT BOARD, FS TYPE, KS ELECTRICAL SWITCH https://www.concretespares.ie/product/castell-brass-ks20-powersafe-electrical-switch-front-mount-with-enclosure-number-of-contacts-4-2-n-c-2-n-o/