Rio developed thee heads as a tungsten altrnative to lead core. They are supple do not kink and sink like a stone.
T14 8-9inches per second, weight 14 grains per foot and is best for single hand rods from 8 through 12 weight, and tips for double hand rods
T17 9-10inches per second weighs 17 grains per foot and is best for making double handed heads and tips.
Each 30ft coil of T14 and T17 features a welded loop in both ends, allowing anglers to cut to the deired length and weight.