I am a teacher and we only get one cartridge a year. I like these cartridges because they are very inexpensive compared to the brand name cartridges used at my school. Also, I can use my printer without worrying about running out of ink. They print really well. I've never had a problem. Sometimes it doesn't work on cards or labels, but it may be paper or printer related. I print a lot so they last me a few months but they still think I'm getting a lot of use for the price.
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