Kerrville 
Riccar R20UP Clutch Agitator Assembly - Part No. D012-1600
Riccar R20UP Clutch Agitator Assembly - Part No. D012-1600
Clutch Agitator Assembly Hall Sensor Belt Protect Model - This is a Clutch Agitator Assembly Hall Sensor Belt Protect Model.
This brush roller works on Simplicity SYMPBP, S20P or S20UP models or Riccar R20P or R20UP.
This roller has a Clutch Agitator Assembly used with a Hall Sensor and a ribbed belt.