The Oki Microline 3390 (80 column) and 3391 (136 column) printers are designed for users who require excellent quality and flexibility from a single printer. The Oki Microline 3390 and 3391 printers are ideal for volume applications requiring high throughput and flexible changing between various print media. High reliability, ease of use and various in-built barcodes makes this printer the ideal tool for industrial, commercial, service, small business and office environments. Customer Reviews. | 
