For use in pairs to permit chimney to go around in joists, rafters or other projections. Add chimney section between offsets to produce additional offset.For use in pairs to permit chimney to go around in joists, rafters or other projections. Add chimney section between offsets to produce additional offset.
For use in pairs to permit chimney to go around in joists, rafters or other projections. Add chimney section between offsets to produce additional offset.
