... -TDC Duct Connection: Flange, Corner, G-clamp Air Duct, Duct Flange, Duct Corner Metal Corner/Snap Coner TDC Corner : For Transverse Duct Connector ... 2.5mm , 3.0mm , 3.5mm ,4.0mm TDF Corner : For Transverse Duct Flange system, the flange is formed from ... , Reducers etc. -----TDC duct connection: flange, Corner, G-clamp -----TDF duct connection: corner, cleat -----Other: Duct hanger, thread rod, self ...