Princeton Artist Brush Neptune, Brushes for Watercolor Series 4750, Round Synthetic Squirrel, Size 6 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 The round is a classic painting brush used for everything from flora and still lifes to portraits and landscapes  just about any subject matter in any style. Larger rounds can lay in large areas of color and stroke specific shapes, while smaller rounds are used for detail.