Black 27
* Tunable diaphragm: Hear high or low frequency sounds* Standard-Finish Chestpiece  Black Tube  Stainless Stem and Headset * Dual-lumen tubing: Two sound paths in one tube eliminates the rubbing noise of traditional double tubes * Not made with natural rubber latex or phthalate plasticizers * Headset is easily adjusted for individual fit and comfort * Angled eartubes align with ear canals * Seven-year warranty provides greater peace of mind