ShurTech-Chalkboard Duck Tape: Black. Perfect for hard, smooth surfaces such as metal, glass and plastic. Make your own chalkboard surfaces for messaging, labeling and fun! Write on with chalk; erase with an eraser, cloth or tissue (sold separately). Tape removes cleanly and easily from most surfaces. This package contains 15 yards of 1-7/8 inch wide chalkboard tape. Do not use on walls. Conforms to ASTM D 4236. Imported.