Custom drilled Tungsten Cones specifically designed for Tube Flies. From the folks at HMH.
Extra Heavy Tungsten cones in standard hole sizes will fit HMH Micro tubing to tie any nested tube pattern. Or tie directly on the micro tubing and add cone for weight. Micro tubing is also used as liner tubing on the Aluminum and Copper tubes and these fit perfectly for those!
1/4" diameter cones in brass, copper and black that fit over 1/16" OD Micro Tubing. 10 to a package.