VERTICAL Single Sided Slant Back Ad/Sign Holder.  This L-Shaped Ad Frame is made to SIDE LOAD for easy insertion of paper.   Paper Slips in easily through the side. This picture frame is ideal for restaurant sign holder or for the desktop.  This economical frame is made with one piece construction.  Available in three different materials: Clear Styrene (More Affordable Option),Clear Premium Acrylic (Higher Quality Option) and Clear Extra Strength PETG (Most Durable Option).