Non-OEM, (4 x 100ml) Bulk refill dye ink for Epson refillable cartridge WorkForce WF-2520 WF-2530 WF-2540 WF-3520 WF-3540 WF-7510 WF-7520 WF-7010 NX530 XP-200 XP-300 XP-310 XP-400
You must have the refillable cartridge to use these ink. You can't refill the original Epson cartridges because of the chips.