Amazon.com: Universal Shop Vac Attachment and Vacuum Hose Adapter With Universal Vac Attachment / Wet Dry Vac Attachments For Your Work Shop. Use Your Wet Dry Shop Vac Accessories With More Attachments :
Mr. Nozzle™ Vacuum Hose Coupler 2" I.D. Hose - 2" I.D Hose Wet/Dry Sho — Detailers Choice Car Care
Dust Right® 4'' to 2-1/4'' Shop Vacuum Tool Port Adapter | Rockler Woodworking and Hardware