Bockens Seine Twine
This is a Swedish product and it is perfect The cone weight 18-19 ounces and contains 1,800 yards.
Seine Twine is made from long-staple, very high quality cotton (it was originally used to make nets so it had to be strong) and is basically unbreakable.
We are carrying the 12/6 size because we believe it is the most versatile. Sett 4 to 10 ends per inch will work great with it.