These Post-it® Extreme Notes with Custom Printing will stick in tough conditions and your message will too! Tailored for tough, these adhesive markers are made with ultra-strong Dura-Hold™ paper and adhesive that will stick to surfaces including wood and brick, in hot, cold and wet weather. Print on each sheet in 1 color black ink only. This product includes 25 imprinted 4 1/2 x 6 3/4 sheets. Choose between green, yellow, orange or red.