The revolutionary NEW synthetic with the control and feel of interlocked bristle. Even more durable than natural hair. Ruby Satin offers a vast choice for artists working in traditional or modern media. Ruby Satin, has a precise snap and fine control and is designed to replace more expensive natural hair brushes. With Ruby Satin, artists experience superb color control with extra heavy bodied tube, or jar acrylics. It is also ideal for use with oils, encaustic or casein. Ruby Satin filaments are sealed and set in seamless nickel plated brass ferrules, then carefully fitted to deep green polished handles. Brush sizes – The length and width of brushes given shape and size may vary by brand as brush sizes are not standardized. Most fine art brushes are handmade and as such some variation is expected even among brushes from within a single brush line.