The whole school will hear and want to know the source of such an ear-piercing sound. Contains rods and tubes of varying lengths and thicknesses and resonance powder. 

Rod lengths are as follows:

• 70cm length, 1cm dia, solid

• 70cm, 1cm dia, hollow                     

• 70cm, 1.2cm dia, solid

• 76cm, 1.2cm dia, solid

• 100cm, 1.2cm dia, solid