Gid / Gidim
Gidim are special thread made from the veins of a kosher animal. Its multiple uses include sewing the batim for Tefillin and sewing parchment panels of megillos or Sifrei Torah together.
The gidim are processed under strict rabbinical supervision and are guaranteed kosher certified.
A roll has approximately 25 Meter.
To attach gid to bayis is approximately 12 inches long.