ZEM BRUSH PRO Interlocked White Hog Bristle Filbert Brushes Set 6 pcs PRO quality Interlocked filbert construction for good spring and shape retention Made from Premium Chungking hog bristle. Solid construction and high quality components Media use with Acrylic and Oils Handle medium length 6.5" or 165mm. Sizes included are 0-2-4-6-8-10. 100% Satisfaction Guaranteed. Very good quality and construction.