This UL® 181 duct is used as supply, return or exhaust. It solves the need for a very strong yet bendable duct.
Duct UL V350-U crimped uncompressed Spec Sheet
Metalflex® is UL® tested and labeled according to UL 181. This is the strongest duct we make.
110744, 110745, 110759, 110760, 110761, 110762, 110763, 110764, 110755