ESAW Maxwell's Vibration Needle Graduated (EEC-11620)

It consists of a hollow cylindrical brass tube open at both ends provided with a small chuck (torsion head) in the middle of which isfixed a plane mirror. The length of the hollow brass tube is 40 cm, diameter is 18 cm and graduated with scale divided in millimeters on both sides from 0 to 15 cm and with vernier to read 0.05 mm. Two solid brass cylinders and two hollow brass cylinders, all of length 10 cm long are provided so that when place end to end, they fill the hollow tube completely. Supplied with superior quality clamp of Cat.No. 2316