Add dimension to projects. The permanent, high-density squares are spaced for quick removal. The top liner is easy to peel off. Great for all types of materials. They are great for layering or just adding a little dimension. This package contains 308 1/4in high density, acid free, archival safe, permanent, acrylic based, lignin free, PAT tested white 3D 1/16 thick foam squares. Imported.