4″ long Mylar® Lineco mounting strips with adhesive backing. Each strip is adhered to the mounting board beside the artwork so the Mylar flange overlaps the artwork, cradling it between the strips, which are assembled at intervals along the edges of the artwork to hold it in place. No adhesive contacts the artwork. When it is time to remove the artwork, simply slide it out. Excellent archival mounting technique! 60 archival mounting strips in the box.