Questions about Primewire 2.5mm Jack to 3.5mm Jack Audio Cable, AUX, HiFi Audio Adapter Jack Cable / Connector Cable

I've been looking for a shorter cable for my HD598 and bought these. Unfortunately, they don't fit (sleeve is too wide) I had to get it from abroad. These ones here are working for me: https://www.amazon.de/-/en/gp/aw/d/B00T6EHY3C?psc=1&ref=ppx_pop_mob_b_asin_title It's TRS plug, so it's 3 conductors for stereo (1 ground). You don't need a TRRS for the HD598

Yes, the manufacturer Primewire claims that they use oxygen free copper.