BMP71 Series R6600 Printer Ribbon. BMP®71 Series snap-in 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 BMP®71 Series ribbon cartridges insert straight into the printer with ease.