Brady, B30-R6700-WT, 133357 4.33" x 200' R6700 B30 Series Printer Ribbon, White B30 Series "Drop and 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 R6700 Series Resin/Wax Formulation is a white ribbon that offers good chemical resistance when printed on the appropriate label material from Brady Recommended for printing on dark-colored heat shrinkable tubing materials, such as black B-342 and B-344 PermaSleeve wire markers from Brady Self-contained B30 Series cartridges drop straight into the printer with a "click"