Whether you're in the classroom office or dorm room these high-quality dry-erase markers will leave behind vibrant color. Use these quick-to-dry and easy-to-erase markers to leave messages for friends or family or to make your classroom white board really stand out. These low-odor markers are a must-have addition to your school supplies and office supplies. Safe and non-toxic. Plastic. 7 1/4" Conforms to ASTM D-4236. Crayola