This kit includes the highest quality instruments. The 3M™ Littmann® Classic II S.E. Stethoscope is the standard of the industry and features 3M’s patented tunable diaphragm for improved low-frequency response and the ability to hear both low and high-frequency sounds without turning over the chestpiece. ADC's Prosphyg Aneroid Sphygmomanometer has a 300mmHg no-pin stop manometer, provides day-in, day-out dependability. Adcuff™ nylon cuff with ADC’s proprietary Size Guide™ marking system, prevents mis-cuffing.