PT.TEC.B2.25.3.240.44.X.R2 | 2.5mm PMMA/PEEK Bur for Sirona* MCX5* Machines (2-Flute Ball) 2.5mm 2-Flute Ball Carbide Milling Bur for PMMA/PEEK FLATCOAT® TEC Coating, Shaft Diameter of 3mm, Plastic Ring.