Canon PGI-29 Light Gray Ink Tank is part of Canon’s 12 LUCIA Pigment Ink System that helps professionals achieve gallery-quality result by expanding the color possibilities. The PGI-29 LUCIA Ink Tanks are approximately 155% larger than previous ink tanks, and almost 40% larger than the ink tanks used by select competitors. Larger individual ink tanks provide greater value as less time is required replacing inks, that way more time can be spent printing. For the Pixma PRO-1 Inkjet Printer