The HP C6120A UV Fluorescent Red Print Cartridge is the ideal solution for metering and the high security postal authority-approved red ink industry. This Remanufactured ink cartridge was produced in our own state of the art facility using the highest quality UV Red Ink, color matched to the US Postal Service. Filled with 42 ml of ink. Compatible with Neopost IJ105, Neopost #8100032H. NOTE: THIS CARTRIDGE DOES NOT FIT ANY FRANCOTYP POSTALIA EQUIPMENT, OR FP MAILING MACHINES.