This listing is for a single (1) vintage Koss M/80 Plus 1" dome tweeter, p/n SP-3T60A. Tweeter has been tested with music & a multi meter.It isin very good working condition.
DCR = 5.3 (#1) .
These are stamped 5 ohms but are more like a 6 ohm tweeter.
Face plate measures 2 13/16" by 3 15/16".