PT.TEC.B2.25.4.250.50.X.R0 | 2.5mm PMMA/PEEK Bur for Roland* DWX* Machines (2-Flute Ball) 2.5mm 2-Flute Ball Carbide Milling Bur for PMMA/PEEK FLATCOAT® TEC Coating, Shaft Diameter of 4mm, No Ring.