Model number:deluxe dual head stethoscope SW-ST24 Deluxe dual head stethoscope. Chest piece made by aluminum alloy, with non-chill ring Binaural made by aluminum alloy, inner spring binaural Tube+eartips made by PVC Features a developed new design chrome-plated aluminum alloy chest piece screw-on retaining ring, and internal spring binaural,matched tubing, and non-chill ring,for professional purpose. |