27-47 in. Telescopic Roof Jack, 2.5/12 Pitch.

The flange can flex from 1/2-4/12 pitch.

This roof jack is the only piece needed to vent your mobile home furnace. For proper fit, measure from the base of the furnace to the flange on the top of the roof.  The roof jack can telescope within the range described for an exact fit.  To adjust roof pitch, see the accessories for the appropriate roof wedge.