Tuning Forks Set of 13 Aluminium

Highly sensitive, good quality with rubber tubing, useful for observing faint sounds and vibrations after due amplification

Comprising two plastic tubes one 305 x 32 mm diameter, the other 305 x 25 mm diameter. The small tube slides within the other in foam plastic collars, allowing the air column length to be varied from 300 to 530 mm.