Williams Colorvue™ Probe Tips, 12 pack Williams Colorvue™ Probe Tips, 12 pack PCVWPT Single-ended probe with color-coding of yellow and black. A plastic round tip. Ergonomic handle. 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.