This information is used to improve and customize your browsing experience and for measuring analytics about our visitors both on this website and other media. In addition, its flexibility allows for easier installation in hard-to-reach areas. Related Sections: 1. HVAC Ductwork 101; HVAC Supplies; Industry Insights; Job Site Installation; Power Hand Tools; Spiral Pipe; Sheet Metal Forming Machinery ; Transverse Connection; Reference Menu Toggle. Sheet metal materials. General e-mail support: (function(){var ml="d.4utm0p%sorc",mi="9377:;482695<03<41<:5",o="";for(var j=0,l=mi.length;j