Gently Used Brush How to Use Load up the brush and pack color onto the lid. You can also use Builder Pro to intensify the outer V, diffuse color for a smoky effect with the tip, or soften and blend transition shades. Other Details Total Length: 152 mm Hair Length: 12 mm Ferrule Width: 8.5 x 5 mm Hair Type: Dyed Saikoho Goat Hair