Genuine yellow toner cartridges like the OKI 43837129 give an unbeatable quality of print. The toner powder found within the 43837129 has been designed by OKI to fuse at the exact temperatures produced by the C9655 printer series. This results in a minimum of wastage and ensures the ongoing trouble-free running of your colour laser printer. Unlike some other big manufacturers, with the 43837129 OKI have opted to create a yellow toner cartridge with an substantial page yield and is guaranteed to last.