Medline Sprague rappaport stethoscopes features Dual-tubing design transmits the faintest of sounds. Incorporates versatility into an excellent Sound-transmitting device. Lightweight aluminum chest piece and binaurals. Durable, 11" long , thick-walled tubing helps minimize background interference. Dual-tubing design transmits the faintest of sounds. Component kit includes two sets of eartips, large and small diaphragm, and an adult, pediatric and infant bell. Reusable to reduce inventory management.