The 3M Littmann Master Classic II Veterinary Stethoscope is designed for medium and large animal applications. Patented single-sided chestpiece combines both bell and diaphragm modes into the same side of the chestpiece. What makes this stethoscope different than the Master Classic II is only the longer tube of 32 inch. The Master Classic has a 27 inch tube. Please note, should you need another colour, we have various spare tubes of 2 inch longer (ie. 29 inch) than the standard Master Classic tubes, which can be viewed in our Spare Parts>Replacement tubes section. We unfortunately only have the Veterinary Stethoscope in Navy Blue colour.