Shop Vac SVR-4505 Black Plastic Hose Adapter | eVacuumStore.com
RIDGID Hose and Accessory Adapter Kit for RIDGID Wet/Dry Shop Vacuums VT1755 - The Home Depot
Shop Vac Hose Connector - SHOP HACKS
Shop-Vac Tool Adapter in the Shop Vacuum Attachments department at Lowes.com
RIDGID 2-1/2 in. Power Tool Adaptor Accessory for RIDGID Wet/Dry Shop Vacuums VT1407 - The Home Depot
Amazon.com: 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 : Tools & Home Improvement