The new "micro" tubing from HMH is a perfect addition to the tube line-up. It is great for smaller nymphs and dries and also fits Small HMH cones, beads and TroutBeads so that you can nest inside Large and Medium tubes...rigid or hybrid.
Two sizes- .031" and .041". - not much difference but the .031" is a bit thicker walled. They are both 1/16" OD but take differnt size tying pins....the .041" and the .031" for the thick wall.
24" of this stuff is now included with HMH Hybrid tubes both Large and Medium.
36" included here with these packs.