6+. New! Non toxic. Works on dry erase & chalkboard surfaces! Look for other Cra-Z-Art Products! Super bright - Wet & dry erasable!. Fast drying! Not washable from fabrics. Wet erasable on chalkboards - Dry eraseable on white boards - Quick start, fast drying chalk markers. For use on chalkboards, backlit board, mirrors, glass, plastic, metal, ceramic, windows & most non-porous surfaces. Water-based markers. Please retain this information for future reference. At CRA-Z-ART, we guarantee our quality. If you are not completely satisfied with our product, please call 1-800-CRA-Z-ART or visit www,Cra-Z-Art.com. Conforms to ASTM D4236. www,cra-zart.com. Look for other Cra-Z-Art products! Made in China.