3M Littmann Classic III Steth Pearl Pink 27 (Each) Screens Privacy a patented removable gel pack Select Ear:Left Ear a patented removable gel pack that can either be frozen or heated depending on the use 100% cotton covered elastic threads form a continuous spiral * Doesn't stretch lengthwise * Washable autoclavable * 33' (10 meters) roll * Packaged in dispenser box less likely to pick up stains Two sided chestpiece with tunable diaphragms on both the adult and pediatric sides * Single piece tunable diaphragm is easy to attach and easier to clean because its surface is smooth without crevices * Pediatric side converts to a traditional open bell by replacing the single piece diaphragm with a non chill rim * Next generation tubing provides longer life due to improved resistance to skin oils and alcohol