we require following types or thermal printer... Paper Widths : - Up to 2 1/8" or 54mm Resolution : - 203 to 300 DPI resolution Print Technology :- Direct thermal Interface :- USB and RS-232 (serial) Print Speed :- 3-6 seconds per Label Weight :- Below 1 Kg Software: --- Barcode Symbologies Code 39, UPC-A, UPC-E, EAN 13, I 2/5, Code 128 and Codabar Networking :- Printer sharing via Windows networking * Eliminate the hassle and expense of printing labels with a standard printer  * No ribbons, toner or ink needed  * conection: USB and Serial * Working with Windows 2000, XP, Vista and Mac OS X (10.2.8 or later). *230v power supply adaptor Every Year, my company will buy 5000pcs of the above configuration thermal label printer.