Patriot Underground Supply Online › Bar hole probe, 30” fiberglass Image 1 of 1 Bar hole probe, 30” fiberglass $70.00 For GX-2003/GX-2012/Gas Tracer Quantity: Add To Cart Added! For GX-2003/GX-2012/Gas Tracer You Might Also Like SDM-2012 Calibration Station $1,280.00 PROBE ASSEMBLY, 30”, ALUMINUM, WITH COTTON BALL FILTER $76.00