This is the same acoustic tubing that the IEM industry uses. It accepts Knowles & Sonion dampers and connects to balanced armatures with Hardman 04001 or low-bloom cyanoacrylate. Do NOT use standard superglue on your IEM builds. This is high-bloom cyanoacrylate and will cause damage to your balanced armature internals.
Large tubing accepts dampers and fits our shells. Small tubing works as a bushing between the armature snout and large tubing. We recommend one order of tubing for every four armature snouts.
Tubing is sold as 1 foot (30cm) of large tubing and 2 inch (5cm) of small tubing.