map Adjustable Cardboard Corner Protector Cardboard Edges Protector 7x7x3cm for Art Packing Shipping Supplies Pack of 40<br> What is this<br> These are three dimensional shaped packaging edge protectors. Widely used in protecting valuable paintings, artwork, picture frames, books and more, to protect corner from crushing, deformation and breakage.<br> What will I get?<br> Overall Dimensions: 7x7x3cm/2.8x2.8x1.2inch(L*W*Iner Dia);<br> Thickness: 1mm/0.04-inch;<br> Material: Corrugated paper;<br> In the package of: 40 pieces.<br> Are there any advantages of the product?<br> Made of thick corrugated cardboard and provide minimal impact absorption; Has a good toughness, not easy to break. Large quantity.<br> How to use it ?<br> The corner protectors have a cardboard flap on the front. Simply fold along the lines before applying onto frame corners.<br> What should I notice ?<br> All size above is measured by manual, please allow +/-0.1 inch error.