Thin Machine-spun wool Tzitzit bundle, includes enough loose string to do all 4 corners.. The strings are made from sheep wool and were machine-spun for the purpose of being used as Tzitzit. This set of Tzitzit Strings can be affixed to the corners of either Tallit Katan or Tallit Gadol. Comes with a Kosher Certification under the approval and auspices of Rabbi Aaron Shapira shlit'a.