OPT&reg; Brand Non-OEM, Bulk refill ink for Brother LC21 LC31 LC41 LC51 LC61 LC65 LC71 LC75 Cartridge OPT Brand. Free shipping from New York. Specially formulated premium quality dye ink for Brother printers.ISO 9001:2000 Certified. Easy Refill Design. No need needles or syringes! Pointed bottle can directly refill the Ink into the refillable inkjet cartridges and CISS ink tank. Package includes: 4 x 100ml of refill ink and and 1 syringe. Colors: Black, Cyan, Magenta,Yellow. No refill instruction. 100% compatible with brother inkjet cartridges.