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Title: Worked perfect through my laser printer
Review: I used these not for mailing but organizing products I was handing out. Different locations needed different quantities, so I printed all the info on the envelope, filled the envelope (though never sealed so I cannot comment on that) and delivered with them. After using the envelope setting on my Brother HL-4570 printer they printed perfect without jams or glue coming off or anything. They stood up to being tossed around in my trunk for two weeks so I'd say they're plenty durable. I'd give 5 stars but they gave me more than a few paper cuts when picking up a handful from the open side.
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