Rubber striker mallet--the tuning fork is made of steel material, which is to and deform, Steel Tuning Fork; 512hz tuning fork--suitable for family and school science experiments, instrument equipment, Tuning Fork and Mallet; Mallet with rubber striker--easy to use and operate, just gently tap the tuning fork with the hammer., Tuning Fork Mounted on Base; Tuning fork in case--multi-functional and versatile, can be used as a physical acoustics experiment equipment, a home decoration, a, etc, Teaching Prop; Tuning fork--insert the fork handle into the base of the resonance box and hit the tuning fork with the hammer, which can sound waves with a frequency of 512 cycles per second, Physics Prop

What's in the box
1 x Electronic Tuners