Connoisseur - Risslon - Watercolor Brush - Rigger - 4 - Connoisseur Risslon Watercolor Rigger Brush is the finest natural squirrel tail hair mixed with Risslon (a synthetic filament) which gives this brush excellent flow and added spring. Squirrel hair holds more liquid than any other natural hair and is excellent for watercolor washes. Connoisseur Risslon Watercolor Rigger Brushes are soft, yet resilient and point beautifully. They work perfectly with any waterbased medium from ink to acrylic, watercolor and gouache. Connoisseur fine artist brushes are hand crafted. Only the best natural hair or synthetic fibers are utilized in the manufacture of this premium line of brushes. This is a size 4 Risslon Watercolor Rigger Brush.