This is a good cable chain. I bought 18x25 for another project (here it is: https://www.amazon.com/gp/product/B01LXHACW5/ref=oh_aui_search_asin_title?ie=UTF8&psc=1) and opened this chain so I could insert the could cable into it, then close it. This chain (15mm x 20mm) will not open. So if you're going to connect a cable with a connector, make sure it fits, otherwise you'll have to remove the connector, then thread the wire, then reattach the connector. Again, this is a good, heavy cable chain. Just make sure you don't have to open the top.
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