Double sided foam tape for hanging signs, art prints on your wall. Works with several types of art prints, Metal, Acrylic, Canvas frames and frameless. Peel and stick system with permanent adhesive (see other listing for removable adhesive system) The thickness of 1/2" and 1" creates floating effect on wall. Price is for: 8 blocks 1/2" thick x 2" x 2" 4 blocks 1" thick x 3" x 3"