This is the CycloVac HE Carbon Exhaust OEM Filter.
Comes as a 2 pack.
Filters are designed for the CycloVac High Efficiency series vacuum to capture the fine black dust produced by the motor, which would normally be deposited on surfaces surrounding the central vacuum unit.
For all models EXCEPT: GS95, GS115, GS215, E215, H215, GS615, E615, H615 and HX615
OEM part #TDFILHEC2.