SKU:

CS-EP-664-M

Condition:

New Compatible

OEM Part #:

T664320-S

Color:

Magenta

Volume:

70 mL

Page Yield:

Up to 6,500 pages (ISO/IEC 24712, Epson methodology)

Chip:

None (chipless bottle)

Warranty:

Lifetime Warranty

Returns:

1-Year Free Returns

Frequently Asked Questions

Bottle specs, quickly?

T664320-S: 70 mL magenta ink for the 664 family, up to 6,500 pages (ISO/IEC 24712, Epson methodology). Fits all eight models listed below.

Does it really fit both the ET-2500 and the ET-16500?

Yes — Epson's Ink Finder lists this code for both, and for the six models in between. The generation split is only in the black bottle (664 vs 774); the colors are shared across all eight printers.

Reds look dead and grays look green. Magenta?

Very likely — magenta is half of every red, and its absence casts neutrals green. Check the tank level, refill if low, and run a nozzle check before reprinting.

Why 6,500 pages here but 7,500 on some store pages?

Both numbers are Epson's, from different model pages (7,500 on the ET-2600/2650 pages; 6,500 on the ET-2500/2550/4500 pages). We publish the conservative figure on all 664 products — the bottle is the same.

What ink type is it?

Epson's US documentation for the 664 family doesn't declare a type, so neither do we. This page sticks to what's officially documented: code, 70 mL volume, yield, and the model list.

Is there a chip to reset?

No chip at all. Refill, confirm on the printer panel so the level estimate restarts, and print.

Is this the same magenta as the 774 set uses?

There is no "774 magenta" — the 774 is a black-only bottle. Printers like the ET-4550 pair the 774 black with this magenta and the other two 664 colors.

How is it different from the 522 magenta?

Different generation and bottle: 522 magenta (T522320-S) is a 65 mL bottle rated 7,500 pages for the EcoTank ET-2400–4810 range. This 664 bottle fits only the eight first-generation models.

Can I refill magenta on its own?

Yes — tanks are independent. Group A printers also have the 4-bottle set for full resets; on Group B printers, colors are refilled as singles beside the 774 black.

Storing a spare bottle?

Sealed, upright, room temperature, out of direct sunlight.

Is this genuine Epson ink?

No — a Clever Supplies compatible bottle built to the T664320-S specification, labeled compatible on box and page.

Cover?

Lifetime warranty — a bottle that fails to perform is replaced — plus free returns within the first year.