School bursars, SACCO clerks, advocates and hospital records staff lean on the HP 305A Black Toner Cartridge for pages that must be read and filed. Fee statements, loan schedules, pleadings and patient discharge summaries all print on black toner alone. When black runs low, text greys out and ruled table lines break into dots. A faded affidavit or tender form can be turned away at the registry, costing a full day. Swapping in a fresh HP 305A Black Toner Cartridge takes about two minutes and needs no technician. Crisp 600 x 600 dpi text returns on the next page, and your filing queue moves again.

Unlike other electronics retailers in Kenya, Mascom International keeps all four 305A colours on one shelf, so you replace only the cartridge that is actually empty. At Mascom International, we're seeing schools and SACCO branches buy black two at a time, since black empties far faster than any colour on a text-heavy desk. Customers across Nairobi report that one black cartridge covers roughly four months at 500 pages a month. Pay-on-arrival delivery reaches Nyeri, Meru, Kisii and every other county, so the HP 305A Black Toner Cartridge arrives before your next deadline.

HP rates it at about 2,200 A4 pages at 5% coverage, which matches a typical letter or invoice. An office printing 500 text pages a month gets roughly four and a half months from one cartridge. Pages with dense tables, dark letterheads or scanned stamps use more toner, so real output often lands between 1,500 and 2,000 pages. Checking the Supplies Status page every month lets you reorder well before the gauge reaches zero. A school bursary printing 1,000 pages during exam weeks should expect to replace black roughly every two months.

Black works out to about KSh 6.82 per page at rated coverage, since KSh 15,000 divided by 2,200 pages gives that figure. A 30-page tender response uses roughly KSh 205 in toner. Cyber cafés around Nairobi CBD usually charge KSh 10 to KSh 20 per printed page, before the walk and the queue. Over a year of 500 pages a month, in-house printing saves a busy office at least KSh 19,000 against cyber rates. Printing in-house also keeps payroll, medical and case files off shared cyber computers and strangers' flash drives.

It fits the LaserJet Pro 300 color M351a, the LaserJet Pro 300 color MFP M375nw, and the LaserJet Pro 400 color M451nw, M451dn and M451dw. It also fits the LaserJet Pro 400 color MFP M475dn and M475dw. All six models use the same four-cartridge set. Check the part number on your empty cartridge before ordering, or WhatsApp us a photo of it and our team confirms the correct code before you pay. Buying the wrong code wastes a trip and delays your printing by a day.

Every letter, number and table border on an ordinary office page uses black toner only. A page of plain text draws no colour at all. Schools, SACCOs and law firms therefore replace black two or three times for every colour cartridge. HP sells each 305A cartridge separately for exactly this reason. You pay KSh 15,000 for the empty black alone, instead of KSh 70,950 for a full set while cyan, magenta and yellow still hold plenty of toner. Over a year, that single-colour approach can save a text-heavy office tens of thousands of shillings.

The 305A suits offices printing up to about 600 black pages a month, where 2,200 pages lasts three to four months. It costs less upfront, which helps small businesses managing cash flow week by week. The 305X black is rated at about 4,000 pages and suits offices printing well above 800 black pages monthly. Both fit the same printers and the same slot. Call us with your monthly page count and we will work out which one saves you more.

Open the front door and pull the cartridge drawer out by its handle. Lift the empty black cartridge from its labelled slot. Unpack the new one, hold it by both ends and rock it gently five or six times to spread the toner. Pull the orange tab and remove the protective packing, then drop the cartridge into the black slot. Slide the drawer back and close the door. The printer reads the chip and returns to Ready within about a minute. Bag the old cartridge for recycling instead of binning loose toner.

Check three things before paying. The box label should read CE410A and carry an HP security label that shifts appearance when tilted. Inside, the cartridge sits in a sealed foil bag. After installation, the control panel should show no used or non-HP supply warning. Clones and refills often trigger that message, misreport toner levels and leave grey streaks down the page. Every HP 305A Black Toner Cartridge sold at Mascom International passes all three checks.

Keep it sealed in its box, lying flat, away from windows, kitchens and hot storerooms. HP rates unopened cartridges for storage between -20°C and 40°C at 10% to 90% humidity, so an ordinary cupboard in Nairobi, Eldoret or Nakuru is fine. Offices in Mombasa or Kilifi should avoid damp corners during the long rains. If a cartridge travelled in a hot car, let it rest indoors for about an hour before opening. Warm toner can clump slightly, which shows up as faint patches on the first pages.

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Every cartridge is backed by the 6-month warranty above, with claims handled at our Nairobi CBD service desk.

Schools, SACCOs and law firms across Kenya rely on Mascom International for original printer supplies, correct part numbers and direct after-sales support.