The Graham Field LAB series (Labtron) represents the premium tier of stainless steel stethoscopes, engineered for clinicians who require superior acoustic sensitivity. Both the LAB-7100 (Adult) and LAB-7300 (Infant) feature a precision-machined stainless steel dual-head chestpiece, which provides significantly better sound conduction than aluminum models. The adult model is designed for general diagnostic use, while the infant model features a miniaturized chestpiece to ensure a perfect acoustic seal on neonatal and infant patients. Each unit is equipped with a non-chill rim for patient comfort and heavy-walled tubing to filter out environmental noise.