Great for the presentation & protection of your Artworks, Crafts, Cars, Photographs, Jewellery etc Product Details The cellos are clear, high clarity & plain, self seal for ease of use The bags are acid & lignum free The bags are made from bi-oriented polypropylene (BOPP or OPP), see size image for micron They are ideal for enhancing the presentation of bookmarks, cards, photographs or crafts NOT FOOD SAFE GRADE They are suitable for long term storage Manufactured in the UK to a high standard Jumbo Fridge Magnet 74mm X 100M + 30mm Self Seal Lip Clear Cello Display Bags - 30 Micron