FBMC is mitered corner for FlowBar diffusers can be joined  ‡together end-to-end.
It also features:

• Optional End Borders and End‡ Caps close off the ends of the diffusers and simplify installations ending at walls and other stopping points.
• Mitered Corners are rendered inactive with factory installed blank-offs.

Titus mitered corner are including following models:

• FBMC-10     1"          Slot
• FBMC-15     1-1/2"   Slot
• FBMC-20     2"          Slot
• FBMC-25     2-1/2"   Slot
• FBMC-30     3"          Slot