54-930-215-0 Fowler Hi Cal Height Gage Probe Accessory Set - FullFowler Hi Cal Height Gage Probe Accessory Set Full This complete set of Probe Accessories for the Fowler Sylvac Hi Cal Height Gage includes the following items 3mm Ruby Ball Probe 1mm Tungsten Carbide Ball Probe 3mm Knife edge Measuring Probe 3mm Cylindrical Measuring Probe 90 Probe Holder M2. 5 90 Probe Holder 4mm Disk Shaped Anvils 7. 7mm x M2. 5 11. 5mm x M2. 5 80mm Extension M2. 5 2mm Ball Point M2. 5 Probe Holder & 3mm Ruby Ball Probe M2. 5