da Vinci Hog Bristle Series 7700 Maestro Artist Paint Brush, Round Medium-Length Hand-Interlocked with Natural Polished Handle, Size 14 (7700-14) Maestro by da vinci is the world's last hand interlocked hog bristle brush in a complete range of shapes and sizes Hand built and interlocked by skilled brushmakers with the best materials european sizing Made with the natural curve of the bristle turned inwards, two equally sized tufts of bristle are set against each other without tension and made to interlock Other Maestro shapes are Series 7000, 7100, 7400 and 7900 Da vinci's very popular maestro 2 hog bristle is a modern update to the maestro traditional construction