Escoda Natural Bristle Brushes preserve bristle quality and shape. These brushes include a new stainless steel ferrule and a more comfortable natural wood handle. The result is a superior brush for oil and acrylic painting as well as decorative techniques. The bristles are unbleached Chungking bristles. Ideals for Oils, Acrylics and Decorative Techniques, Stiffness 6 on 6. Triple Crimped Ferrule.