tesa® TACK XL are transparent, double-sided adhesive dots for attaching objects to walls, windows, or mirrors in private homes or offices. While the basic tesa® TACK product can be used to attach postcards, among other things, the XL version enables larger papers or calendar pages to be hung securely without the aid of magnets, drawing pins or nails. The double-sided... adhesive dots are convenient to use, can be removed without leaving any residue and can be reused. Note: To achieve maximum adhesive performance, the surface should be dust-free and dry.