Flat grinder burr set for the Compak K6 grinder. Specifications: External Diameter: 63.5mm Internal Diameter: 38mm Thickness: 9mm Holes: 3 Weight: 453g Material: Steel Suits: K5, K5 Old, K6, K6 Barista Professional, K6 Old, K6 Silenzio, K6 Telescopic, K8 Old.