* Package includes 40 adjustable cardboard corner protectors, which will protect 10 frames and are reusable. It includes easy-to-follow folding instructions. * Mr. Pen adjustable cardboard corner protectors are made from thick, corrugated cardboard to provide additional protection against impact during shipping, packaging, and moving. * Each edge protector has 3 tab slots that can easily be adjusted to fit frame corners between 1 to 2.1 inches thick. * Mr. Pen adjustable cardboard corner protectors are designed to protect valuable paintings, artwork, picture frames, and books. * Our cardboard corner protectors are shipped flat but can easily be assembled in seconds; use the included instructions to fold along the lines to your preferred width before applying onto frame corners.