Frequently Asked Questions

• What is in this set of 4?

  The box holds: 4K0T7LN (1,000 pages), 4K0T4LN (800 pages), 4K0T5LN (800 pages), 4K0T6LN (800 pages). Each cartridge is individually sealed.

• Which printers does this set fit?

  The set fits OfficeJet Pro 8125, OfficeJet Pro 8135, OfficeJet Pro 8139. The complete verified list is in the Compatible Printers section on this page.

• What does the 'e' in 923e mean?

  The 923e is HP's EvoMore line — the same fit with more ink and a higher page yield than the standard 923. EvoMore cartridges are sold for the 8100e/9100e e-series generation and, in base (non-e) form, the OfficeJet Pro 8125, OfficeJet Pro 8135 and OfficeJet Pro 8139 covered here.

• Does every cartridge in the set carry a chip?

  Yes. Every cartridge in the set carries a new compatible chip that reports its own ink level to the printer.

• Does the set work out cheaper than buying singles?

  Yes — the set is priced below the same cartridges bought one by one, and one box restocks every slot at once. Check the per-cartridge yields above against your usage.

• Will this work if my printer uses HP+?

  if your printer was set up with HP+, it accepts original HP cartridges only — that lock is part of the HP+ program and applies to every non-original cartridge, ours included. On printers that are not HP+-locked, these cartridges install and print as normal.

• Do I have to install the whole set at once?

  Yes. Open and install only the colour the printer asks for, and keep the rest sealed — they store fine for when their turn comes.

• The printer is showing a warning after I installed it — what now?

  Acknowledge the message, reseat the cartridge until it clicks and restart the printer. Most warnings are a one-time notice that a non-original cartridge was fitted. This family runs HP dynamic security: the printer checks the cartridge chip, and HP firmware updates can change what is accepted. Our cartridges carry a new compatible chip built for these models; if a future HP firmware update ever blocks a cartridge, the lifetime warranty covers you — contact us and we will put it right.

• Will this fit the OfficeJet Pro 8130e or 9120e series?

  Those e-series variants (the 8100e/9100e generation with HP+) are not covered by this listing — this family page covers the base models named in the Compatible Printers list.

• Is this a genuine HP set?

  No. It is a Clever Supplies compatible set built to the original HP specifications and covered by our lifetime warranty. It is not manufactured by HP.

• What happens if a single cartridge from the set fails?

  Contact us with the colour and the problem — the lifetime warranty covers each cartridge in the set individually, so a single faulty cartridge is replaced on its own.

• Which cartridge in the set runs out first?

  It depends on what you print: text-heavy use drains the black first, photo and graphics work drains the colours. Each cartridge reports its own level, and the spares from this set store sealed until their slot asks for them.