DirectVent Pro features tight inner connections for superb performance. DuraVent’s direct venting is specified exclusively by nearly every major stove and fireplace manufacturer in the United States and Canada, with the largest choice of termination caps for direct venting available. All black pipe lengths, pipe extensions, and elbows feature laser-welded outer-wall seams for a sleek finish. Low-profile locks and the absence of hems/beads allow for a beautiful product that provides an elegant interior.