This factory replacement 120 volt motor fits Cen-Tec CT20QD and CT20DXQS series power brush heads. Check the bottom of your power brush to see the manufacturer and model.
This motor has a V-Drive pulley, not a smooth or a cogged one. Be sure your motor has the same.
We suggest you also purchase a new replacement belt for longer life. To order the replacement belt see our part TLS547.