Features:1) High density ribbon from Japan2) Long printing life3) Neutral or COBOL packing box4) ISO9001:2000, ISO140015) Compatible with OKI DATA ML390/590/591/520/521/8356/8358; PRINTEC PR9330/9350; MAI 423C/4235/4236;O.E.M.NO.:521060016) Color: PU,BK7) Offer preleadered kits version