Ideal for marching bands, athletic and academic teams, booster clubs or any school group that travels, these innovative tubes are designed to provide secure storage and protection for banners, posters, flags and other items. Tubes are 26 5⁄8 in. long and are available in two color-coded diameters: 2 1⁄2 in. (grey) or 3 1⁄2 in. (black). The unique interlocking design allows you to add optional middle sections by simply screwing them into place.You can create a tube of any length by adding any number of these 12 in. long middle sections. Constructed of high-density polyethylene, these lightweight tubes are water resistant and ultraviolet light proof.