Tytan122 Pro-Lite Stethoscope Features * Chestpiece Solid aluminum adult chestpiece is lightweight and provides good acoustic reponse. * Binaural Lightweight eartubes with a reinforce dual inner-spring construction provides extra durability and preset at the anatomically correct angle for optimal fit. * Tubing Durable, one-piece molded PVC tubing for better sound transmission. No double tubes to rub together and create back ground noise. * Comfort Chestpiece has a non-chill rim on both diaphragm and bell. So there's no need to warm it up before use. Soft screw-n eartips that assures maximum comfort and seal tightly. * Packed in a deluxe gift box and come with an extra diaphragm with a pair of plastic eartip.