You'll have every paint brush you need to paint delicate details like butterfly wings and tiny creatures with this incredible Callia paint brush set for oil, acrylic and watercolor, designed by Willow Wolfe. My Callia Watercolor Details paint brush set contains five amazing paint brushes including a 5/0 Spotter, 0 Fine Round, 3 Round, 1/4" Angle and a 2 Flat brush. Willow Wolfe designs the very best art supplies and paint brushes for all mediums.