This new product from HP has an HP Code CN684WA with a standard page yield of 550 pages. The previous stock Code CB321WA discontinued in October 2010 had a standard page yield of 800 pages.

They are reasonably priced cartidges, but they tend to run out sooner than I would expect.

I always check at least 3 sources,comparing quality, price and [...]. This one is tops in all three categories. Really pleased that Google pointed me here!

Clean Replacement; Long Cartridge Life; Sharp Tones & Colors; Truth in Advertising