3L Mounting Squares are a simple way of sticking pictures into a photo album Instead of having to mess around with glue or photo corners these work like small stickers that you stick on the edges of each picture Fast and flexible and no risk of them falling off 3L Mounting Squares are furthermore made from acrylic which gives a much longer lifespan than products made from rubber The product is also PAT-approved which means that it is safe to use with your pictures and guaranteed acid-free Every packet contains 500 stickers