This Non-OEM Black Ribbon is designed as a high-quality alternative for the OKI 42377801. Each box contains 6 ribbons, perfect for replacing worn-out ribbons in OKI printers (models 420, 421, 490, 491). With reliable performance and compatibility, this ribbon ensures efficient and clear printing.

• High-quality non-OEM replacement
• Compatible with OKI 420, 421, 490, 491 models
• Includes 6 ribbons per box
• Ensures clear and consistent printing