Doppler Effect Demonstration Apparatus, 92dB buzzer, 0.8m tether. Nylon cord is 2ft 8in attached to a rugged ABS handle 8.5in long, (1in diameter), Swing the apparatus and students will be able to hear the change in frequency, Dimensions: 4.5 x 5 x 3 in
Double Graduated Flint Glass Cylinder, White graduations, numbered both upward and downward, With pourout and heavy molded base, Graduation interval: 1 mL, Size: 100ml