Bockens Seine Twine
This is a Swedish product and it is perfect The cone weight is 1lb.
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 carry our two favorite sizes: 12/9 and 12/6. Generally, 12/9 will accommodate 4 to 10 ends per inch and 12/6 will accommodate 8 to 16 ends per inch.