Purchase of refilling of cartridges for printers used in the Education System Informatization Department, preventive maintenance of printers and scanners HP Laser Jet P2055n Printer (cartridges must be filled to the weights specified by technical requirements and their weights must be marked on them) HP M1522NF Laser multi-functional printing device (cartridges must be filled to the weights specified by technical requirements and their weights must be marked on them) EPSON PRINTER L800 (cartridges must be filled to the weights specified by the technical requirements and their weights must be marked on them) Printer EPSON M200 CIS ALL-in-one (cartridges must be filled with weights specified by technical requirements and their weights must be marked on them) Printer EPSON L550 Color ALL-in-one (cartridges must be filled to the weights specified by the technical requirements and their weights must be marked on them) I-Sensus MF734 Cdv Color Laserjet printer (cartridges must be filled with weights determined by technical requirements and their weights must be marked on them