Varnish brush. Pro-extra series features extra-thick, extra-long filaments for outstanding paint-holding capacity and long brush life. Bine tynex nylon for softness and ease of paint flow, chinex for faster clean-up and with self-flagging tip, and orel polyester for consistent stiffness retention. Purdy's proprietary tipping and flagging methodology ensures exceptional paint distribution. Pro-extra brushes are available in a variety of models and ideal for all exterior paints and medium- to heavy-bodied interior flat paints.