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Amazon.com - The Dryer Vent Store Vacuum Hose Adapter Kit Vac Reducer Attachment Vacuum Cleaner Hose Adapter Dust Collection Connector Fits 1 1/16 to 1 3/4 in, Use with Central Vac Accessories 4 Pieces -
RIDGID Hose and Accessory Adapter Kit for RIDGID Wet/Dry Shop Vacuums VT1755 - The Home Depot