Genuine Canon 2104C001 CLI-581M Magenta Ink Cartridge

Compatible Printers:  PIXMA TR Series:  TR7550 TR8550 PIXMA TS Series:  TS6150 TS6151 TS6250 TS8150 TS8151 TS8152 TS8250 TS9150 TS9155

Price: £10.79 from Ebuyer