The Shieldmaster Finishing Plate slots around the outer diameter of the twin wall flue pipe when passing through a wall or roof internally and/or externally.
This plate is available in 0-30 and 30-45 degrees depending on the angle of your system.
Shieldmaster twin wall flue is CE approved for use in the UK, designation number EN:1856-1 T450 N1 D Vm L50050 G60.