Yes they do
I believe they do. You can look on the website and it will tell you if they sell a product in the store or just online.
Yes they carry it. If you need you can get a attachment to join two smaller pieces together if you need a longer length.
Yes they have ethrnet but not sure what lengths they carry you can check on thier website though.
Yes they do carry Ethernet. However the length you're searching for May not be in stock.
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