VERTICAL Single Sided, Side Loading Sign Holders.  This holder is made to SIDE load for easy insertion of paper.  Paper slips in easily through the SIDE. This economical frame is made with one-piece construction.  Available in three different materials: Clear Styrene (More Affordable Option), Clear Premium Acrylic (High Quality option) and Clear Extra Strength PETG (Most Durable Option).  MADE IN USA!