For HP 2040 range of B&W laser printers.
Compatible toner.
Clearing out office cupboard of old used toners: this one appears to be unused, but from ~2013ish.
I held this back from recycling.
It’s been a while, but this could conceivably be good for 20k prints.
HP Toner cartridge (BT15)
This offer has been gifted to someone and is no longer available.