Double Stick Photo Mounting Squares

This Double Stick Photo Mounting Sqaures by 3M are great for invisible mounting. Made with Acid-free, double-face, self-stick squares to make attaching to the back of your photos easy to do. * Acid free and photo safe * Includes 500 squares in a pack * Mounting squares are double sided * Measures: .47'x.51'(12mmx13mm)