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Material	Galvanized steel , stainless steel
Specification	3"-100"(φ75~2500mm)
Thickness	0.5t、0.6t、0.8t、1.0t、1.2t
Standard length	3M/uint
Features	The spiral seam is formed by double seam flat lock technique. Entire fabrication process is done automatically by high speed spiral round duct machine with great precision. Since the duct has no rough edges, it can be safely handled onsite.  The rigid construction of SL type spiral round duct complies with SMACNA Standard.
Other components	FGA round duct flat ring flange or FGL round flat ring flange