We replaced larger bulkier ones with your new ones and they are working out better for us. We are using the 5S system and I have used other products of yours as well to help organize our labs. All items that I have purchased have been of very good quality and the service and speed in which they were shipped to us was outstanding. Thanks for providing quality products. I will always check out TrippNT first for all my organizational needs.
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The book holders worked out great 
