The Original Mack Sword Striping Size 0000 Series 10 Blue Squirrel Hair Pinstriping Brush 3/16" THIN Hair Head Width Size: 0000 - Head Width: 3/16 in. (Less hair than Size 000) Handcrafted and shaped as it was many years ago - The original mack Series 10 sword striping brush. The very finest grade of blue squirrel - 100% unmixed natural blue squirrel hair. Designed for pinstriping, design and scroll work - Blue thread ferrule - Hair Length: 2 in. Extra attention given to quality control with respect to shape and cleaning.