Write-on/wipe off WPS pesticide chart is perfect for central posting. This 25" x 18" laminated WPS Pesticide Poster is waterproof to last for many seasons. Features a write on/wipe off surface that allows you to make changes to data at any time. Use a China marker or erasable marker on this WPS poster. Gemplers Reusable WPS Pesticide Posters are backed by our Quality Guarantee. See our Gemplers Product Guarantees page for full details.