1 kg packing. Micro Nutrients is a mixture of vitamins and trace minerals to ensure that fermentations complete to dryness and more. Dosage from 0.04 to 0.17 gram per liter mash. When used in pre fermentations the yeast cells grows extremely strong and healty and then performs at top in fermentor. Good fermentation to completion and sometimes also 0.2-0.9% extra ethanol because yeast have strenght to ferment to higher dryness. Works with all yeast strains.