They're 40mm rise Surly Open's.
This bad boy https://www.sjscycles.co.uk/carriers-racks/delta-cargo-net-4-hook-version/ - Really really good/strong/plastic clips are boss.
I have a couple of those, I found the elastic loses it's stretch pretty quickly, especially if used in a way that ensures things stay where you want them to.
@JB started
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They're 40mm rise Surly Open's.
This bad boy https://www.sjscycles.co.uk/carriers-racks/delta-cargo-net-4-hook-version/ - Really really good/strong/plastic clips are boss.