Description
The game consists of a number of tubes connected to each other in unusual ways: who is at the other end? The 4 pairs of tubes are usually set out in a circle, but other layouts are possible, as long as each pair is no more than 30m apart. AISI 304 stainless steel structure Ø 40mm; each pair of conical mouthpieces/earpieces Ø 270mm is connected by flexible PVC tubing.