Hello quber,
I couldn't find anything in our online knowledge base on the expiration of the ink sticks, I would suggest speaking with the supply department @ 1-800-822-2200.
We have a case of colorqubes - 4 boxes of 6 Qubes each.
Cartridge-free Solid Ink Phaser 8860/8860MFP in red, black yellow & blue.
Are they useable or do the cubes have an expiration date ?