This Black Pearl long handle brush is made of mightlon synthetic filament. It will hold up to the most rigorous treatment with heavy bodied and tube acrylics. Black Pearl is recommended for use with acrylic colors, oil and water mixable oil colors. It"s ideal on canvas and large mural surfaces. Mightlon filaments are epoxy set in polished seamless aluminum ferrules. Fitted to long matte black handles. The perfect brush for the value minded consumer. This Black Pearl long handle brush is available in round shape and comes in size 12. Measures 13-3/4-inch length by 5/8-inch width by 5/8-inch height.