These are 4 ounce rolls of heavy 7-ply waxed polyester embalmers' twine. There are approximately 110 yards (330 feet) per roll.
This embalmers' twine is approximately 1 mm in diameter and is waxed with brown wax. It is 100% polyester with a 100 pound break test strength.
Embalmers twine is tightly twisted to facilitate hand sewing fine, straight stitches. Its applications include taxidermy, leather crafting, shoe repair, and, indeed, the preparation of the deceased.
It is also ideal for craft projects such as stitching hides, jewelry, crafts, basket weaving, dream catchers, and more.