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Inner Trim Ring
The inner trim ring is used for trimming around the pipe on the inside of your home in case the hole for the vent pipe is too big.
12″ Duct Tube
The optional 12” duct comes only in the 4” size. The tube comes stamped with snaps that will fit our Low Profile, Wide Mount, J-Block, Soffit/Eave, and Fresh Air 4” models.