I searched for 902XL and found this product. There were several similar ones, but this one had good reviews especially for my printer. I had to change color cartridges first, so I didn't look at black. When I did this today I noticed that it is smaller and not XL. I thought it was a mistake and even took a picture of the cartridge. Then I went back to my order and saw that it indicated black is only L and the rest is XL. 1. I don't know what the "L" stands for and 2. I didn't pay much attention as the description mentioned 902XL all along and I didn't tell you the black is smaller until you get to the details. The ink works, although HP gives you an annoying message that it's not an HP cartridge and sometimes you have to press OK to get it to print. Is this a bait and a substitute? Maybe not quite, but I will NOT buy it again if I can get a Black XL for the same price from other sellers.
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