ZT.DIA.B2.05.3.055.42.X.R2 | 0.5mm Zirconia Bur for Sirona* MCX5* Machines (2-Flute Ball) 0.5mm 2-Flute Ball Carbide Milling Bur for Zirconia FLATCOAT® DIA Coating, Shaft Diameter of 3mm, Plastic Ring.