49mm Outside Diameter x 30mm Inside Diameter, three hole, right hand rotation. Replacement "Flat" Grinder Burrs for Ascaso & Innova espresso grinders. Some Innova models use a larger burr set: MF_506, 54 x 31mm, so be sure to measure your existing set first. Use a search engine to find a conversion table for standard to metric measurement conversions
 "(MC_25) Ascaso - Innova/Faema Family Espresso Grinder Burr Set - Flat")
