MP-20 microprobes 98-0249 - Huntron microprobes with banana plugs with safety jacket for the Tracker 200, 2700 / 2700S, 2800 / 2800S, 4000, 3200S, ProTrack, Tracker Model 30 and TrackerPXI. Can also be used with any device that accepts 4mm (0.16 ") safety jacketed banana plugs.