Black Edition Chestpiece, Black Tubing The Littmann® Classic III™ Stethoscope features and benefits include: High acoustic sensitivity when performing general physical assessment. Tunable diaphragms on both the adult and pediatric sides of the chestpiece. Single-piece diaphragm that’s easy to attach and easy to clean because the surface is smooth and without crevices. Open bell versatility allows the pediatric side to convert to a traditional open bell by replacing the single-piece diaphragm with a non-chill sleeve. Next-generation tubing with improved resistance to skin oils and alcohol for longer tubing life. Less likely to pick up stains. Chestpiece is precision-machined into an aesthetically pleasing, less angular shape. The stem features an open side indicator. No natural rubber latex or phthalate plasticizers are used in the tubing or any other component.