Introducing a new option to upgrade your current 5 octave Coe Practice Marimba. Composite resonators! These composite tubes are super light-weight and will install directly onto your current practice marimba (as long as it was made after 2010) without any modifications. There is nothing to install on your current frame, the resonator tubes come with all the necessary mounting brackets. These are made with a composite light-weight material and many parts are also 3D printed. Price is $3,200 plus shipping. These can also be ordered along with brand new rosewood practice marimbas. The price for a complete rosewood practice marimba with composite resonators is $7,400 US Dollars plus shipping. Email us if you have any questions or need more information!