Poster glue dots are double-sided adhesives that bond instantly to clean dust-free surfaces. They remove easily without staining or leaving a sticky residue. Ideal for hanging posters; photos; and other lightweight items on wood; glass; cinderblock; painted walls; foam board; metal and more. This package contains one 2-1/2x3-1/2x3/4 glue dot dispenser with 200 adhesive dots (10mm wide). Acid free; non-toxic.