This is a protective cable cover to reduce abrasion on the cable on top-mounted damper units.
A cable shield will reduce wear from rubbing on the masonry inside the chimney during use. Highly recommended for installations where there is an offset in the chimney. Install a section long enough to provide protection just past the offset or areas where the cable will rub. This is a longer length allowing for multiple pieces to be cut from it. Also available in a 7 foot length - Item #1282.