VENTILATED DISC SILENCER Fits any ventilated rotor and is made of natural rubber with lead weight inserts. It easily wraps around rotor to deaden vibration and chatter. Fits John Bean/FMC and Accuturn. DIMENSIONS: 32" long Made of natural rubber with lead weight inserts Fits any ventilated rotor Deadens vibration and chatter Fits John Bean/FMC and Accuturn Dimensions - 32" long .