Mr Heater's Flexible Heater Duct F150043 features 25' of 14" wide ducting compatible with the Mr Heater HS2000ID-XL Heater and is used to distribute air throughout the house, building or other area. A draw band allows this 16" hose to fit the 14" adapter and enables to connect 2 hoses together providing 50' of duct. The F150043's flexibility also makes it quick and easy to install anywhere.