Surface Shields' Zip N Close® Construction Dust Containment Poles makes constructing temporary walls to control dust and heat loss, quick, simple, and affordable. The Dust Shield PRO locks the screening material firmly against the ceiling. The dent resistant poles, crafted of a heavy gauge aluminum, can be extended up to 12 feet and are designed to stand up to the toughest conditions. Once done, the Dust Shield PRO pole can be compacted to just 57 inches tall. Two poles per set.