Block for Floyd Rose Tremolo units. Studies have shown that Mass = Sustain. The all new Fat Brass "L" shaped sustain blocks by Floyd Rose have been specifically designed to take advantage of the unused area under the tremolo arm. By incorporating an additional "L" shape of brass to the design of a stock sustain block, Floyd Rose has been able to utilize this previously unused space for additional mass which equates to more sustain and additional tonal qualities of brass. Size: 37 mm