PIRA Classification: 3A60.51
Description: 4 pairs of rods (10.5", 13.5", 16.5", and 19.5" long) are mounted vertically in a steel bar. Each rod has a mass near its upper end. When one rod is 'plucked', its counterpart vibrates, but the other rods will not.
Special Instructions: None
Condition: Ok
Setup time: 1 minute
Safety Issues: None