HP uses a single part# Q6505-69010 for network-capable formatter assemblies which fit the LaserJet 4240, 4250 and 4350 series printers. View the Details to select the formatter which matches your model. This is a refurbished network model formatter for use in the HP LaserJet 4240N 4250N 4250TN 4250DTN 4350N 4350TN 4350DTN (network model). HP part# Q6505-69010. Formatter assembly only; memory DIMM not included.