Gain triple the amount of advertising space in a small footprint with this three tier double-sided poster sign holder. Durable aluminum rectangular tubing construction has a matte black powder-coated finish. This poster sign holder has a 1/4" top slot with an offset design for easy insertion. Each of the three tiers will hold a 22" x 28" (W x L) insert up to 1/4" thick if used single-sided or up to an 1/8" thick if used double-sided. The base is electrically welded with steel inserts providing extra support for this poster sign holder. Overall dimensions measure 23" x 15" x 89" (W x D x H).