Ink Buying Guides
Straight answers on compatible ink — quality, cost, warranty rights, and finding the right cartridge for your machine.
M5 250mL Compatible Printer Guide
Every MemJet mailing and label printer compatible with our M5 250mL cartridge family — AstroJet, Formax ColorMax, FP Edge, Hasler, iJetColor, Neopost/Quadient, and RENA/Quadient — with a link to the right ink for each model.
Read guide → ReferenceOEM Ink Part-Number Cross-Reference
Know your OEM cartridge number but not which compatible cartridge to buy? Cross-reference Formax (CJ-21–CJ-24), AstroJet (123-2412–123-2415), and the M5 family to the right USA Ink Supply product.
Read guide → Buying GuideCompatible vs OEM Ink
How compatible and OEM ink really compare on print quality, printhead safety, warranty, and cost — and where the up-to-45% savings come from.
Read guide → WarrantyDoes Compatible Ink Void Your Warranty?
What the Magnuson-Moss Warranty Act actually says about your right to use compatible ink — and how to switch with total confidence.
Read guide → CompatibilityWhich Ink Does My Printer Use?
Identify your printer or postage meter model in seconds, then jump straight to the exact compatible ink it takes.
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