Statement Brows. Accurate, hair-thin lines are not a problem for the ultra slim automatic pencil with a fine brush. The texture is waterproof, sweatproof and longlasting. The mine has a diameter of 1.5 mm to perfectly define the arch of the brows. Emphasize the brows subtly or make them stand out with the Slim’Matic Ultra Precise Brow Pencils. Depending on personal preferences, the fine tip is ideal for filling in any gaps, achieving the desired shape or optically broadening the brows.