BRADY B30-R6600 Printer Ribbon,Black,200 ft. 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 R6600 Series Resin Formulation offers excellent solvent and friction resistance when printed on the appropriate label material from Brady Recommended for printing on heat shrinkable tubing materials from Brady, including material numbers B-342, B-7641, B-7642, B-7646 and B-7647 Self-contained B30 Series cartridges drop straight into the printer with a "click"