91093 Math Numbers 1-20 ,Smart Poly® Chart 13"x19", Numbers 1-10. Write-on/ wipe-off heavy duty washable all poly chart, no lamination needed. Use with dry erase or water based markers and washable crayons. Use with , pins, tacks, staples, etc. to hang in the classroom. Great for reusable learning. Glossy surface, .45mm.