As a loyal customer, I`m extremely disappointed in these mailers .As a RESULT of using this product, i found that they tear and rip easily, making them unreliable for shipping valuable items. The industrial and scientific aspect of these mailers is completely lost due to their lack of durability. The only pro I can think of is that they're inexpensive, but you get what you pay for. Save yourself the headache and invest in higher quality mailers..
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