sku=GD50-99,select_size=Probe/Explorer Markings are 1 2 3 5 7 8 9 & 10mm|sku=VGD50-750,select_size=Probe/Explorer Double Ended 3 6 9 &12mm markings|sku=VGD50-740,select_size=Probe/Explorer Double Ended 3 6 9 12 15 & 18mm markings|sku=VGD50-735,select_size=Probe 20-23 Explorer TT DE