Smart Poly™ material has been designed for charts in the classroom and home. These charts are strong, durable, water resistant, and do not need lamination. They can be displayed like any chart with hooks (grommet), Ashley Smart Tak™, pins, tacks, staples, etc. The surface is designed for dry erase and water based markers and washable crayons. Chart measures 13" x 19" with a dry-erase, glossy surface, .45mm. This set of 11 charts includes: Days of the Week (91038), Months of the Year (91039), Hundred Squares (91040), Calendar (91041), Incentive with Grommet (91042), Class Schedule with Grommet (91043), Classroom Rules with Grommet (91044), Chores with Grommet (91045), Blank with Grommet (91046), Birthdays with Grommet (91047) and I Lost A Tooth with Grommet (91060).