Those are MTL coal cars. I have some Grandt Line and La Belle coal car and boxcar kits, but I haven’t assembled any of them yet.
More info on the MTL coal car Sharon install here:
Dale thought I might have issues with the Accumate boxes fouling the trucks of these cars on short-radius turns. I’ve nothing tighter than 25” on my layout at present, but I’m constructing a couple of test tracks at 18” and 15” radii to experiment with. (My layout probably won’t ever go below 18”, but it’ll be good to have the info.)