Princeton Artist Brush Neptune, Brushes for Watercolor Series 4750, Script Synthetic Squirrel, Size 1 A beautiful range of shapes including mottlers and quills with rich wood tones and sea glass aquarelle handles Our softest and thirstiest synthetic brush, delivering oceans of color More durable and affordable than squirrel Soft and Supple with even release of color Liners come in a variety of lengths and belly shapes. Liners have very fine points and are often narrower than a round. Delicate work such as outlines, small details, lettering and long continuous lines can be achieved with liners.