Superduos are pressed glass 2 hole beads from the Czech Republic. They have a uniform tapered petal shape that can easily be woven together in many shapes and patterns, and are therefore very popular in bead weaving and bead embroidery. The holes are .8mm and can accommodate Micro C-Lon, Nymo D thread or Fireline, which can all make multiple passes through the holes. Use with size 10 English Beading Needles. Our Superduos are sold in 22 gram tubes containing approximately 300 beads, depending upon the finish.