RIO developed the T-14 as a tungsten alternative to lead lines. T-14 contains no lead, it is supple, and does not kink.
The T-14 weighs 14 grains per foot and sinks at 9 inches per second. It has really become the staple weight material for making your own Skagit style sinking heads.
The T-8 weighs 8 grains per foot and sinks at 7 inches per second.
Cut the T-8 or T-14 to the desired length and make your own sinking heads/sections that you can easily loop on or off. 30 foot coil sections and braided loops in each package.