This is a great price on these cassettes compared to other manufacturers. Works perfect for our fiber system, We already had the corning enclosure on hand and these cassettes fit very well. I also bought some MPO cables from this company and they are high quality as well. They include the MTP connectors and not some generic cheap connector, and they were able to make a custom length for my needs. I am very happy with my purchase and will buy again when we do our next expansion. Thank you! Jonathon