These glass Bernoulli tubes are designed for demonstrating the Bernoulli effect produced by water flow. The kit includes a Bernoulli tube with central constriction, a constant-bore gradient tube, 6 lengths of glass tubing, 2 swan-necked outlet tubes, and 8 pre-cut lengths of connecting tubes. The flow tubes measure 19.6" long with a 13mm diameter, and connected tubes are spaced 5.9" apart. The apparatus can be extended to form 500mm manometers using the included glass tubing lengths. Suitable for classroom demonstrations of fluid dynamics and the relationship between fluid speed and pressure.