Assertion: glockenspiel's bar | /r/MadeOf | aluminum
Facets:
Source sentences:
text: The black and white bars the instrument comes with are made of aluminum and have enamel finish.
text: The bars of the vibraphone and glockenspiel are made of an aluminum alloy.
text: Like the marimba and xylophone, the vibraphone and glockenspiel also feature resonant bars that are struck to make sound, but the bars on these instruments are made of aluminum or brass instead of wood.