This product is perfect for mini LP covers. .Marketing suggests its thickness is 4.7m... I'll take my word for it as I don't have a micrometer handy to check. But I will say it's significantly thicker than the one-off sleeves that come with some CDs - once you open it, forget it...trying to reuse it will chip it. However, this product is said to benefit from a thickness of 6-10m. I still had to use it carefully to put the mini LP sleeves back in...so definitely don't throw it away, but not as thick as you don't worry. The tape is sticky enough to keep the cover closed, but it will definitely lose its adhesion. after several opening/closing functions. But hopefully by then the crease that forms at the top when closing is enough to keep it closed on the shelf. It doesn't look like the material allows moisture to get inside...which is a good thing. CONCLUSION: I give this product an 8/10. Before I buy more, I'll see if I can find other cases with thicker plastic. Otherwise a new order will be placed.
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