The Panasonic KX-FA136 Film Roll Refill includes 2 black rolls specifically designed for use with the Panasonic KX FA136 model fax cartridge. This product ensures high-quality printing and reliable performance for your fax machine, allowing you to easily refill your cartridge and keep your office running smoothly. With the trusted Panasonic brand, you can trust in the durability and compatibility of this film roll refill.