B30 Series "Drop & Click" print ribbons enable 5-second ribbon supply changes. No calibrating, no threading, no waste, no hassles and the ink always faces the right direction! One-color ribbon for printing a single color onto a label. R6400 Series Resin Formulation offers superior chemical and abrasion resistance when printed on the appropriate label material from Brady®. Recommended for use with materials designed to resist chemicals, such as B-492 Frozen Surface Polyester and B-481 Chemical Resistant Polyester. Self-contained B30 Series cartridges drop straight into the printer with a "click".