Bulk 10 bobbins NYMO Nylon Beading Thread Size B for Delica or Seed Beads - Black 119 Yds (108 Mtrs) Made in US NYMO Nylon Beading Thread Size B for Delica or Seed Beads - Black 119 Yards (108 Meters). Bulk pack 10 bobbins Size B is quite fine. 0.20mm thick. Made in USA