Series 47 round brush with blonde hog bristle and long handle.
Amazon.com: Amy Howard at Home - 2" Round Hog Hair Paint Brush - Great for Chalk Painting, Waxes, DIY Home Decor, and Furniture Restoration - Made with Natural Hog Hair Bristles
Winton Hog Bristle Brushes | Winsor & Newton
Raphael D Brush D'Artigny Hog Hair Oil Brush - RISD Store
Jackson's : Black Hog Brushes : Series 333 / 334 / 335 / 336 | Jackson's Art Supplies