Utax PK-3021 is a toner cartridge line from Utax for buyers who need the page to confirm the exact product rather than browse a broad family. Where the source data supports it, the useful buying markers are colour, yield, and the exact printer series. In practical terms, this listing points to black. Keep the part code 1T0C0 x 0UT0 visible through quote, approval, and reorder stages so the same line can be matched again without drift. The main mismatch risk in this area is that colour and printer-series fit need checking before reorder.