91081 Smart Poly® Chart 13"x19", Number Line -20 to 120. 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 Ashley Smart Tak®, pins, tacks, staples, etc. to hang in the classroom. Great for reusable learning. Glossy surface, .45mm.