Stainless steel 45mm fenders from Velo Orange as seen here: https://velo-orange.com/collections/700c-fenders/products/vo-45mm-stainless-fenders-700c
I used them for a few months in the winter a few years back but had issues preventing rubbing, and they sat in the basement since then. Unfortunately, I must not have cleaned them well and some residual salt remained, as there are some rust spots on the inside, with a small line that rusted clean through (see pictures). Hoping someone can make better use of them as they are good looking fenders that should last a bit with proper care.
Though not shown in the pictures, I have the mounting gear as well. The stays were cut for my bike, but replacements are available from Velo Orange if needed.