Detailed Product Description Elbow(Steel Elbow / Pipe elbow/ Bend /Connector)Purpose:HVAC,inlet and outlet of vent...Used in ventilation ... ducting system for connector or joint or regulating .etc.Material:Galvanized steel ,stainless steel ... HAVC fitting ,vent duct ,ship duct,air duct ,regulating damper,connector ,elbow and many other special pipe fitting