6" Inch Aluminum Hose Flexible Air Duct Pipe for Rigid HVAC Flex Ductwork- 25' Feet Long - Amazon.com
18" Inch Flexible Aluminum Ducting Hose Insulated R-4.2 Air Duct Pipe for for Heavy Duty HVAC & Exhaust Ductwork Insulation - 25' Feet Long - In Accordance with UL 181 - Amazon.com
Spiral Pipe (6″-24″) – Air Handling Systems
2-DFD-T-50 Flexaust #DFDT200050 DFD-T (DFDT) 2 inch Air Duct Hose - 50 — HoseWarehouse
Rubber-Cal 1 in. D x 25 ft. PVC Flexduct Coil Flexible Ducting in Blue 01-203-1-25 - The Home Depot
16" Inch Flexible Aluminum Ducting Hose Insulated R-8.0 Air Duct Pipe for for Heavy Duty HVAC & Exhaust Ductwork Insulation - 25' Feet Long - In Accordance with UL 181 - Walmart.com
Inner Diameter 75mm Aluminum Foil Hose Ducting Flexible 1.5/3/6 Meter Pipe Ventilation Heater Hose For Barbecue Smoke - AliExpress