Franco chains in solid 14K white gold, from 1.5mm.
The link. V-shaped links interlocking into a dense square profile. A franco is heavier than most chains at the same width, which is exactly why people buy it — it hangs straight and does not kink.
With a pendant. The density means a franco carries a heavy pendant without stretching, where a rope of the same width might.
See also 14K white gold chains, yellow gold franco chains, silver franco chains and all Necklaces & Chains.