Clarke 147093051 CarpetMaster vacum roller brush is a commercial-grade replacement brush that fits CarpetMaster 215 vacum cleaners.  Installs easily and quickly.  Unless you enjoy arm-aching and back-breaking suffering to your body from the constant back and forth of using a worn-out roller brush . . . do your body a favor and change your vacum roller brush every 6-9 months.  Your body will immediately notice the improvement.  When you need it done right & fast the first time . . . .