Michigan-O Probe Michigan-O Probe PO Single-ended, color-coded probe. Ergonomic handle. Michigan"O". SKU Handle PO #30 Round PO6 #6 Satin Steel™ Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.