Replacement Grommet for the NutriMill Classic Grain Mill. This piece fits into the flour bowl on your NutriMill Classic Grain Mill. If your mill starts leaking flour then this is the cause. After years of heavy use your original grommet may start to wear down. NutriMill is a brand manufactured by L’Chef LLC. Bosch does not authorize, endorse, or sponsor NutriMill, nor any other brand, which appear on this site.