I know there are cheaper options around for Non-Canon cartridge replacements and also refill kits, but I think this looks a good price for a genuine canon cartridge as they are normally quite expensive.
I dont have a full list of compatible printers but i know it fits my MP210 all in 1 printer.
Also please note the canon replacements do contain more ink than the ones that come new with the printer (though in my experience all cartridges run out far too quickly!!)
Colour cartridges also available at £13.75
Product Description: Canon PG 40 - ink tank
Consumable Type: Ink tank
Printing Technology: Ink-jet
Printing Colour: Black
Included Qty: 1
Canon has poured all the Know How of its extraordinary history of developing innovative office machines into each of its copiers, printers, and networked office systems. The same superiority of design and manufacture goes into all of the Canon-branded consumable imaging supplies and parts for this equipment. Naturally, no one makes better parts and supplies for Canon products than Canon. Using genuine Canon parts and supplies is your best insurance against equipment damage, and possibly voiding your equipment warranty.