Maybelline Brow Ultra Slim Defining Eyebrow Pencil Warm Brown Achieve ultra-precise hair-like strokes for the most defined and natural looking eyebrows yet. The pencil features a smooth and break resistant formula an ultra slim 1.5mm precision tip and built-in spoolie brush to create precisely defined brows. Available in six shades ranging from light blonde to black brown. Our new ultra slim defining brow pencil features a one and a half millimeter tip and spoolie brush for a natural brow look. No pencil breakage and no color streaks. New ultra-smooth formula. If you loved Brow Precise Micro you ll love Brow Ultra Slim for ultra smooth precisely defined brows.