This is a compatible replacement for the Neopost 4135554T (ISINK34) fluorescent red inkjet cartridge. It delivers a standard yield of up to 8,500 pages, ensuring reliable performance for your Neopost printer. Designed to meet original specifications, this cartridge provides print quality comparable to the Neopost brand. Save significantly compared to the MSRP of the original Neopost cartridge while maintaining high-quality printouts. Backed by our 100% Quality Satisfaction Guarantee.