Bell set Middle C to C above. Includes 8 hard rubber mallets. Separate wooden resonating chamber for each bell. Rhythm Band RB2123 This bell set is one of the most widely used and internationally accepted resonator bell sets on the market today. These bells were perfectly tuned by a unique electronic process developed by Rhythm Bands craftsmen which insures absolute perfect pitch throughout the entire range of the bells. There is no plastic used in the construction of these bells. The resonator chambers are constructed from the finest lightweight woods available and are specially selected for maximum acoustic properties.