Isabey Yellow Handle Chungking Bristle Brushes are quite simply, the highest quality bristle brush available. Stiff and coarse, it is designed for the weight and wear of oil and acrylic paints. Highest degree of spring and precision in one bristle brush. Finest quality Chungking Chinese hog bristle available. Most hairs per square inch of any bristle brush for an extra thick tuft. "Interlocked" curved hairs maintain a tight and precise brush shape.