2″ turned out with open corners on the end designated, often used for drops and ceiling boxes.
To be used only with welded pressure files. Duct or fitting is fabricated with raw ends, no end treatment applied, no notches or flanges. This allows for a flush weld in the field to the next piece.
TDC designation for straight duct in L shaped sections. Corners will be installed in each L section resulting in 4 corners factory installed. All other corners and accessories are shipped loose.