Canon C-EXV 16 Yellow Toner Cartridge Unit for use in iR2230/2270/2870 copiers. OEM Ref - 1066B002. Page Yield - up to 27000. Whilst your Canon branded items are certainly designed to work at the best of their abilities at all given times, there are some ways in which you can improve the efficiency levels of your branded items, be they printers, copiers or other office equipment. Fitting your branded Canon goods with Canon consumables certainly helps and these cartridges will increase the quality of your print outs.