3m Littman Master Classic II Black Stethoscope Exercise Tubing Bands Access DIGITAL (LCD) READOUT * 250 151146 DIGITAL (LCD) READOUT * 250 lb * The heavy duty dynamometer features the hydraulic system that is used in the industry accepted Baseline© and Jamar© hand dynamometers and pinch gauges * Hydraulic system ensures accurate readings * The dynamometer is much lighter (1 NO SIZING REQUIRED Fits all wrists Black 27 * Tunable diaphragm conveniently alternates between low and high frequency sounds without the need to turn over the chestpiece * Excellent acoustic seal and comfortable fit with patented Snap Tight soft sealing eartips * Comfortably angled anatomically correct headset * Patient friendly nonchill rim and diaphragm * High performance single lumen tubing in a range of attractive colors * 3 year warranty *