B3F58A is the HP 2580 Black Solvent Print Cartridge.  40ml delivered ink.

HP 2580 Black Solvent Print Cartridge:
• Fast dry time, long decap time for high-productivity intermittent industrial printing
• HP solvent ink for coated foils, flexible films, glossy boxes, hard plastics, and more
• High-quality small character and barcode readable output

Best pricing, customer service and delivery available at www.inkpronto.com