OKI 42377801 Microline Black Original Ribbon Cartridge

OKI 42377801 – Microline Black Original Ribbon Cartridge

Keep your OKI Microline dot matrix printer running at peak performance with the OKI 42377801 Original Black Ribbon Cartridge. This genuine OKI ribbon is engineered specifically for the Microline ML400 series printers, delivering consistent, high-quality black output across multi-part forms, invoices, receipts, and continuous-feed documents — page after page, shift after shift.

As an original OKI consumable, this ribbon cartridge is precision-manufactured to match the exact specifications of your Microline printer, ensuring reliable ink transfer, consistent print density, and maximum ribbon life without the risk of print head damage associated with third-party alternatives.

Key Features

• Genuine OKI Original Ribbon: Authentic OKI formulation for optimal print density, compatibility, and print head longevity
• Consistent Black Output: Uniform ink transfer for sharp, legible black text across all print passes
• Multi-Part Form Compatible: Delivers sufficient impact force for clear printing on multi-copy forms and carbonless paper
• Long Ribbon Life: Engineered for extended use in high-volume dot matrix printing environments
• Easy Drop-In Installation: Designed for quick, tool-free cartridge replacement with no mess
• OKI Quality Assurance: Manufactured to OKI’s strict quality standards for reliable, consistent performance

Specifications

• Part Number / SKU: 42377801
• Brand: OKI (Okidata)
• Ribbon Type: Original Dot Matrix Ribbon Cartridge
• Color: Black
• Printer Series: OKI Microline ML400 Series
• Barcode (UPC): 051851040868
• Weight: 0.2 lbs
• Condition: New, OEM

Compatible Printers

• OKI Microline ML420
• OKI Microline ML421
• OKI Microline ML490
• OKI Microline ML491
• OKI Microline ML520
• OKI Microline ML521
• OKI Microline ML590
• OKI Microline ML591

Why Choose Genuine OKI Ribbons?

Third-party ribbon cartridges may use inferior ink formulations that produce uneven print density, smear on forms, or cause premature print head wear. Genuine OKI ribbons are precision-engineered to deliver consistent ink transfer, protect your print head investment, and maintain the reliability your business depends on. For mission-critical dot matrix printing — invoices, shipping labels, multi-part forms — there’s no substitute for the real thing.

Ideal for: High-volume dot matrix printing, multi-part forms, invoices, receipts, shipping documents, and any application requiring reliable, consistent black impact printing.