Product Description Purdy 144024020 Adjutant Natural Bristle Brush Angular Trim Brush From the Manufacturer Long recognized for its ability to hold and deliver more paint than any other material, Black China bristle reaches its ultimate potential in Purdy handcrafted professional brushes. Only the world’s finest Black China bristle is selected. It is boiled under pressure for absolutely thorough cleaning and bristle straightening. Then varying bristle lengths and stiffness are formulated and blended, carefully avoiding reverse bristles which could cause dragging and streaking.