Chartpak Expand-A-Tube Storage System Black
These lightweight durable tubes made of virgin high density polyethylene are water-resistant and ultraviolet lightproof. Ideal for storing mailing or transporting. 26 5∕8" long tubes can expand in length 12" at a time by adding optional middle sections. Ideal for storing items like school banners or flagpoles. Gray tubes have a 2½" inside diameter black tubes have a 3½" inside diameter.