GBC HeatSeal NAP I Laminating Film is designed for roller laminators with 1 inch core and is used to laminate flashcards, charts, certificates and bulletin board materials. This 25 inch x 500 foot laminating film has a high gloss finish that is an excellent write-on or wipe-off surface. Laminating your classroom or office tools offers security from tearing and wrinkling for added durability.