Smart Poly material has been designed for charts in the classroom and home. The charts are strong, durable, water proof, and do not need lamination. Use with Ashley Smart Tak, pins, tacks, staples, etc. to hang in the classroom. The write-on/wipe-off surface is designed for dry erase or water based markers and washable crayons. Smart Poly Chart measures 13" x 19" with a heavy duty, glossy surface, .45mm. Sold as a pack of 6 charts.- Incentive Chart.- Black Confetti.- Measures 13" x 19".- Sold as a pack of 6 charts.- Write-on/ wipe-off surface.- Durable, all poly material, no paper, heavyweight.- Sold as 6 pieces/Bundle.