International Standards Organization, ISO Q1 flag. Blue Q1 flag made of flag quality 200 denier nylon. Printed and or Acid Dyed and finished with a polyester header and brass grommets. All Q1 flags have 4 rows for lock-stitching on fly end. These Q1 flags are appropriate for outdoor use. Blue ISO Q1 flags available in 3’x5′ and 4’x6′ sizes only.