Sticky Tungsten Putty: A special blend of pure tungsten powder with a highly "sticky" adhesive. Apply directly to your leader or at the head of the fly. A little goes a long way. Contains 85% tungsten, no lead! With lanyard.
WARNING: CA Prop 65
This product may contain chemicals known to the State of California to cause Cancer or Reproductive Harm. https://www.p65warnings.ca.gov/