Tube, 28 inch The Littmann Classic II Pediatric stethoscope features a 1-inch traditional bell combined with a floating diaphragm. Stethoscopes feature a solid stainless steel chestpiece for high acoustic sensitivity Features: One-inch traditional bell (pediatric) Stainless steel chestpiece. Excellent acoustic seal and comfortable fit with patented 3M Littmann Snap Tight Soft-Sealing Eartips. Comfortably angled, anatomically correct headset. Single-lumen tubing is available in attractive colors. Three-year warranty. Specifications: Used as a diagnostic aid as part of the physical assessment of an infant or pediatric patient.