Okidata C3400 replacement chip, also compatible with the following models:
Okidata C3400n 16 - 20PPM Color LSR
Okidata C3520 16-20PPM Color LSR
Okidata C3530 16-20PPM Color LSR
Okidata C3530n 16-20PPM Color LSR
Okidata C3530n MFP
Okidata C3300n 12-16PPM Color Ptr LSR

Note: This chip will only work on replacement cartridges (not starter cartridges), and will offer a page yield of 1,000 pages on the Cyan, Yellow or Magenta chips, and 1,500 pages on the black chips - that is the standard capacity page yield.