Microboards Black Cartridge, MX1/MX2/PF-PRO Print Factory, 58.9ml, Approximately 20,000 Prints @ 10% Coverage Microboards part number: PFP-HC-BLACK As a dealer for Microboards equipment and supplies we offer 30-day exchange on defective items. After 30 days please contact Microboards technical support. Warranty: 1 year at Microboards