This new material, years in the making, is a combination of mostly grenadilla powder with a special synthetic resin. It shares many of the same acoustical properties of grenadilla, with a similar density, but without the risk of cracking or dimensional movement. The added dimensional stability and durability makes the MAX bass clarinet the premium choice for those who perform in a variety of environmental conditions whether it's the classroom, pit orchestras, the parade block or the marching field.