Okidata Okipage 6ex 600 600 toner and drum unit http://cs.okidata.com/cs.nsf/LookUp+Get/OKIPAGE6ex?OpenDocument us-ascii ENHANCED PCL5,PJL,EPSONFX,IBMPR,HIPERWINDOWS OKI OKIPAGE 6ex (HP4P) OKI DATA CORP OKI OKIPAGE 6ex A hpijs 600x600 dpi does not work out-of-the-box, if you have a lot of graphics and the memory not upgraded. Use 300x300 dpi instead.