I'm an avid record collector and former record store owner and have been looking for these cases. Anything thicker than 3 mil is too thin and "stretchy", and 4 mil cases are too thick and cloudy quickly. But the best part about these sleeves is that they DO NOT extend 1/4 to 1/2 inch past the top of the record. So no more valves on the record that crumple and crumple. I'm slowly replacing all my sleeves with these. With thousands of entries, this will take some time. Highly recommended.
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