There are practically no limits to the possible scope for these individual resonator bars. They are used throughout a wide sector, from initial music education in kindergarten, elementary education in primary and special needs schools right through to special pedagogic therapy institutions and in music therapy. There is a choice between rosewood and Grillodur bars for the soprano to the bass section. Grillodur is a reliable, high quality synthetic material that has the tonal characteristics of a xylophone bar. This material offers additional technical advantages, such as stability and temperature resistance, thus guaranteeing constant pitch.
These are available with real calfskin or goatskin, or in most cases with a plastic head. Natural skins have a warmer timbre than the somewhat dry sound of plastic heads. Plastic heads, however, have the advantage of constant pitch. They do not react to changes in temperature and humidity