CERTIFIED MICR—Ampro's Certified MICR cartridge with a NEW Chip guarantees OEM performance. COMPLIANT - Compliant with US & North America Banking Systems. HIGH YIELD - Based on the industry-standard 5% coverage, our high-yield cartridges will produce 950 single checks or 2800 business checks @ 3 checks per page. COMPATIBLE PRINTERS -. Laser Printers M110, Laser Printer M110WE, Laser Printer M110W, Laser Printer MFP M139, Laser Printer M140W, Laser Printer M140WE, Laser Printer MFP M141w TRUSTED 2-YEAR GUARANTEE– Backed by 25 years of industry experience, Ampro replacement toner cartridges come with responsive U.S.-based customer service and a lifetime guarantee for quality. As an industry expert, Ampro brings superior-grade MICR toner cartridges to your doorstep that meet the most rigorous US and International banking systems to ensure flawless printed checks.