Galvanized or stainless steel;
With insertable joints to duct;
With gaskets.

T-pieces are designed to connect different or same diameter circular ducts. TRT-D-d T-piece connects main line with secondary line in 90 degrees angle. TRT-45-D-d T-piece connects main line with secondary line in 45 degrees angle. TRKT-D-d is used when main line is splited into two seperate lines. T-piece units are made from galvanized sheet metal with insertable connections to duct.