The Rolair VT402007-1 Compressor Wheel supports proper airflow within compatible compressor systems. This replacement wheel rotates with the compressor assembly to move air through the system during operation. Proper wheel function helps maintain consistent airflow and normal equipment performance. It can replace a worn, damaged, or faulty wheel during maintenance or repair. Installin... https://www.wholetoolbox.com/rolair-vt402007-1-compressor-wheel/VT402007-1.html