One-inch traditional bell (paediatric) and 3/4″ bell (infant) combined with a floating diaphragm. Solid stainless steel chest piece. Excellent acoustic seal and comfortable fit with patented 3M Littmann Snap Tight Soft-Sealing Ear tips. Comfortably angled, anatomically correct headset. Single-lumen tubing available in attractive colours. Tubing length 71cm (28inch) Littmann performance rating 7/10 Latex Free Three-year warranty. Additional Information Two-sided models offer high acoustic sensitivity with traditional bell/diaphragm chest pieces and are designed and sized for children and infants. 3M Littmann Classic II Paediatric and Infant stethoscopes feature stainless steel chest pieces optimally sized for paediatric and infant auscultation. The Pediatric stethoscope features a 1-inch traditional bell combined with a patented floating diaphragm. The infant stethoscope features a 3/4-inch bell with a patented floating diaphragm. Both stethoscopes feature: solid stainless steel chest pieces, single-lumen tubing, patented 3M Littmann Snap Tight soft-sealing ear tips; comfortably angled anatomically correct headsets and patient friendly non-chill rim and diaphragm.