Rexair Replacement Motor Shaft Power Nozzle Sleeve for D3/D4/1650/2800 - is currently on backorder. You may still purchase now though and we'll ship as soon as more become available.
Rexair Replacement: RR-6220
Motor Shaft Power Nozzle Sleeve for: D3/D4/1650/2800
Manufacturer Part Number: 78-8010-01