Fluke networks nfc swabs series fiber optic swabs fluke networks nfc swabs 25mm the fluke networks nfc swabs 25mm are fibre optic swabs that have been designed to clean sc st fc and e2000 connectors with either upc or apc polished ferrules unlike traditional swab cleaners that rely on the technique of the user these swabs will provide consistent cleaning every timethe user can easily engage the cleaner using a simple push motion and the user will hear a click sound when the process