Vial set Spex tungsten carbide-lined 3/4 (19.1mm) x 2 inch (54mm) diameter, includes two slip-on Delrin caps with tungsten carbide inserts, six disposable methacrylate center cylinders, and two 5/16 inch (7.9mm) tungsten carbide balls, volume 5 mL, grinding load 0.5–1.5mL, mixing load 3mL