Pebeo Cobra Filbert No.10 Brush, Synthetic Mongoose Hair, 11mm Pbo cobra brushes are springy, hard wearing, easy to clean, and have great colour retention Finely pointed curved synthetic hairs made of polyamide fibres (curved synthetic mongoose hair); yellow brass ferule; long, rosewood lacquered handle Pbo cobra brushes are ideal for painting with thinned oil paints and acrylics Pbo Cobra Filbert brushes are available in 10 different widths from 52mm to 20mm Cobra brushes are available in round, bright, and filbert shapes