EconoSpace® Black 3.2mm x 1.5m lengths (pk20) EconoSpace® is a neutral pH plastic peel & stick type art-glass separator that bonds to the edge of the glass in a picture frame. This is used to make the proper airspace between the art and glass in either wood or metal picture frames. This airspace helps prevent mold growth, paper buckling, image transfer and adhesion to the glass. It is available in 4 sizes from 1.5mm airspace up to 9mm and most come in clear, black, and white. EconoSpace® can be used to frame photographs, watercolors, pastels, any paper art or document. • Quick & easy - Saves time. • Works in both wood & metal frames. • Professional looking - No painting. • Neutral pH - No plasticizers - Wont harm fine art. • Cuts easily & clean with razor or shears. • .005 Inch neutral pH acrylic adhesive. (Adhesive is 250% thicker than the others). • Hollow for stiffness & lightness - doesnt tend to sag in the frame. • Available in clear, black and white. • Both with glossy and matte finished sides. Note: This product is sold in pack pack quantities.