When you own a leaf vacuum, the fan-turbine can malfunction leaving the unit inoperable. This equipment part is a replacement for all five-horsepower Tracvac models. It will also fit the Tracvac 580 model. The part has a twelve-inch diameter, and the shaft is 3/4 of an inch in length. This model has six fins that are three and one-half inches in length. The part's design means it is well-balanced to allow for smooth operation.