MACK 20 SERIES Squirrel Hair SWORD STRIPER PINSTRIPING BRUSH Part# 20-00; (1 Brush) SIZE: 00 HEAD WIDTH(INCHES/MM): 7/32" / 5.55mm, America's NO.1 Selling Striper-Best for All Around Work! 20 Series - Squirrel Hair SWORD Stripers (The 20 series is made in sizes 00, 0, 0, 1, 2, 3, 4, 5). America's NO. 1 Selling Striper and Touch-Up Brush, The Sword Style is best for all around work, Lacquer & Enamel Resistant, Made in U.S.A. in 7 sizes: # 00 thru # 5, Regular Length Of Hair: 2 inches or 5.08cm