RIO developed the T-14™ as a tungsten alternative to lead. T-14 contains no lead.
It is level, supple, does not kink, weighs 14 grains per foot and sinks about 9 inches per second.
T-14 is best for single-hand rods from 10 through 12 weight, and double-hand rod with spey lines #9 and heavier. T-14 works especially well with the Skagit Spey lines.