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Dust Collection Cone Reducer 4-Inch to 2 1/2-Inch plus 5 Vacuum Hose Adapters Fits 1 1/16 to 1 3/4 inches Includes Shop Vac Adapter 2 1/2 to 1 1/ 4 inch and 1 Rubber Reducer | Pricepulse
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2 Dust Fitting Adapter for Shop Vac 1-1/4 in to 2-1/4 in Diameter Hose - Walmart.com
Shop Vac Dust Fitting Adapter for 1-1/4'' to 2-1/4'' Diameter Hose | Elite Tools
4" x 2-1/4" Hose Connector
Buy 3 Pieces Universal Vacuum Hose Adapter, 2-1/2 Inch to 1-1/4 Inch, 1-1/4 Inch to 1-3/8 Inch to 1-1/2 Inch, 1-3/8 Inch to 1-1/4 Inch Wet Dry Vacuum Converter Reducer Attachments for Vacuum Cleaner Online in Japan. B08Y8PBKHW
Buy EZ SPARES Universal Vacuum Hose Adapter,Fit 1 3/16 to 1 1/4 to 1 3/4 to 1 1/2 inch Convertor,for All Different Vacuum Reducer Hoses Attachments,Compatible with Common Models-6 Pcs Online in Hong Kong. B08149YTR9
Taytools 467085 2-1/2 Inch Outside Diameter OD Flexible Cuff Coupler Dust Collector Shop Vacuum Hose Connector with 2 Hose Clamps for Hose 2-1/2 Inches OD - - Amazon.com
WoodRiver - 2-1/2" x 10' Hose Kit with End Fittings
G946-225 | Green Line Hose & Fittings
SVR-4505 Vacuum 2 1/4" Intake to 1 1/4" Black Hose Reduces Adapter for Shop Vac | eBay
2-1/2'' Shop Vacuum Hose Adapter | Rockler Woodworking and Hardware