HP C4836a cyan ink cartridge. No 11
Genuine HP C4836ae cyan (blue) ink cartridge (No11) 28ml

for the HP colour inkjet CP1700, business inkjet 1100 & 1200 series, the 2200 series, the 2300 series & the 2600 also the OfficeJet 9110, 9120 & 9130 machines & DesignJet 110plus & 110plus nr