Bowstring

A bow string is used in the Fletching skill to create bows. It is created by using flax with a spinning wheel, which requires level 10 Crafting and grants a player 15 Crafting experience.

Their trading place is at Seer's Village bank, although some are moving to Lumbridge because of its proximity to a Spinning wheel.

Spinning flax into bow strings is a good way to make money because flax sells for 100 coins each, while bow strings sell for up to 180 coins each.