Refill cartridge is designed for use with 3M Heat-Free Laminating System LS1001. Cartridge film laminates both sides of an item for enhanced protection. Laminate items up to 25" wide and as long as 250'. The 5.6 mil refill features a glossy finish and can be used to protect many items. It is perfect for posters, signs and maps as well as documents, schedules, presentations, phone lists, certificates, awards, calendars, children's artwork and more.