1kg spirits filtration Carbon use to remove off-flavor from alcohol you distilled. 12x40 mesh granulate.
Use about 1 cup of carbon to 4-5L of spirit.
Soaking neutral alcohol with activated carbon for a week or even longer will help remove off-flavor, which is known as polishing the spirits.
Note: Many impurities are held by fine carbon dust, you'd better flush the carbon with water and filtrate it with paper filter before use.