This is the #255 20/0 Golden Taklon Round Detail Paint Brush from Atlas Brush Company.
FEATURES: Ideal for fine detail painting or any job requiring a very fine tip May be used with oil, acrylic polymer colors, water colors or ceramic paints Wooden handle
INCLUDES: One 20/0 Brush
SPECS: Approximate Length: 5.5" (140mm) including bristles
BOX DIMENSIONS: 1.50" W. X .38" H. X 6.25" L. BOX WEIGHT: .01 LBS.