Silver Shine Stethoscope for Doctors & Students (Dual Head) Product Description Chest piece with special diaphragm, designed for adults,Tunable diaphragm responds with a simple pressure change to capture low and high-frequency sounds Perfect Spring Action,Extra soft sealing ear knobs Flexible frame which would not hurt your ears. For physicians/medical professionals. Light weight chest piece, Compact & Classic Look Package Weight : 500 gm Package Dimension (approx) : 23 x 14 x 8 cm Free Shipping