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£346.03 inc. VAT
AI-generated summary
Honestly, £288.36 ex‑VAT for a pair of Brother magenta cartridges (TN‑900MTWIN) is a “think twice” purchase unless you already know you’re going to print enough colour volume to justify it quickly. For most teams, toner spend creeps up fastest when print jobs are sporadic—if you don’t run colour regularly, you end up paying premium pricing for consumables that sit around. And Brother’s “twin pack” is often about convenience and slightly better cost-per-cartridge, but it doesn’t magically turn expensive ink-equivalents into a bargain—this is still high-cost territory.
Who *should* buy it: someone with a Brother colour laser that reliably runs magenta (marketing, signage teams, small print rooms, reception/office environments printing periodic brand colour). If you’re already on this cartridge range and your spend is predictable, buying the twin can reduce downtime risk and keep costs steadier. Who *shouldn’t*: cost-conscious buyers with low colour usage, mixed printing habits (mostly mono), or anyone who can’t forecast monthly page counts—those teams are better off waiting for deals, looking at alternative supply channels, or reviewing whether they can reduce colour printing frequency before locking into a pricey cartridge order.

Canon
Canon CLI-42 LGY - 6391B001 - 1 x Based Light grey - Ink tank - For PIXMA PRO100,PRO100S, PIXUS PRO100

Brother Supplies
Brother TN910BK - Ultra Jumbo - black - original - toner cartridge - for Brother HL-L9300, HL-L9310, MFC-L9570

Brother Supplies
Brother LC422 - Black - original - ink cartridge - for Brother MFC-J5340DW, MFC-J5340DWE, MFC-J5345DW, MFC-J5740DW, MFC-J6540DW, MFC-J6940DW

Canon
Canon 045 - Black - original - toner cartridge - for imageCLASS LBP612Cdw, MF632Cdw, MF634Cdw