Speedi-Boot provides Ease of Installation, Improved Energy Efficiency & Indoor Air Quality. Installation time is reduced from approx. 20 min. to 2 min. or less. No need to to buy additional materials, set up saws, install wood or steel support framing. With one trip up the ladder extend the telescoping arms, fasten with the pre-attached nail & or screw in place, adjust the positioning and you're done. The predrilled holes provide for easy grille/register installations & eliminates sagging registers. The Rigid Mud Ring prevents boot deformation and gaps between the boot & building envelope. The air tight gasket eliminates air leakage saving you Money & Energy. Dust & Debis contamination is elliminated which provides a clean HVAC duct system that improves Indoor Air Quality. Perfect for Floor, Wall or Ceiling applications, Remodeling, New Const., Do it yourself, Residential & Commercial HVAC projects with over 150 sizes & styles to choose from for almost any project application.