INKA external corner adjustable 85-135 degrees TTI-YH123 123/72/145mm PC/ABS white RAL9016. Open external corner that covers the opening between two installation ducts that have been installed at an angle to each other. The corner piece consists of two parts that can be adjusted to each other to create the required angle. Angle adjustment 85-135°. Protection class IP40 if the installation duct system is mounted directly on the wall. For TTY-IH123, the cover plate TTI-BP can be used to achieve protection class IP20 if the system has been installed using brackets. Material PC/ABS.