Revain description says they are for 8mm or 8.8mm, Specter says they work up to 9mm but packaging says they are for wires from 7mm to 8mm are. I fitted them to my 9mm wires that I bought them for and there is no way they could fit without damaging the wires, they even fit 8mm wires. Lots of sharp edges, plastic is hard and unforgiving, you get what you pay for, not recommended for high priced wires.
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