Refurbished IBM 6400-005 Line Matrix Printer, 500 LPM, Twinax Attach, Quiet Cabinet. The IBM 6400 Model 005 is a feature-rich impact printer designed to complement the current IBM 6400 line printer offerings. This model utilizes the IBM 6400 print mechanism to print at up to 500 lines per minute (lpm) and supports all features currently available on the 6400 family. IBM M.A.Q. (Maintenance)!