MACK 20 SERIES Squirrel Hair SWORD STRIPER PINSTRIPING BRUSH Part# 20-1; (1 Brush) SIZE: 1 HEAD WIDTH(INCHES/MM): 5/16 / 7.93mm 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