Products We’ve taken the time to design and produce quality HVAC products. Our expert welders carefully craft each order for reliable, precise service in every use. From adapter curves to lined ducts, MTI caters to every HVAC need. « Back to CatalogCurb Adapter 18GA Minimum Construction G90 Galvanized Construction Fully Welded Watertight Seams Fully Insulated Internal Transitions designed to lower Static Pressure Corrosion Resistant Weld Coating Factory Installed Lifting Lugs Sloped sides to facilitate water runoff Optional Galvalume Construction View PDF « Back to CatalogCurb Adapter 18GA Minimum Construction G90 Galvanized Construction Fully Welded Watertight Seams Fully Insulated Internal Transitions designed to lower Static Pressure Corrosion Resistant Weld Coating Factory Installed Lifting Lugs Sloped sides to facilitate water runoff Optional Galvalume Construction View PDF