Printhead HP C4812A No. 11 magenta for HP Business Inkjet 1000, 1100dtn, 1200d, 2280tn, 2300, 2300dtn, 2300n, 2600, 2600dn, 2800, 2800dt, 2800dtn, Officejet 9110 , 9120, 9130, Officejet Pro K850, K850dn