They may not be ,but when I first started using cibachrom we used sheets like that .they had individual little windows with colored filters to view the print and help you determine color correction. Did not have color analyzers for fhototogs back then.
Sometimes I soup my roll film in those large tanks. I "string" the reels on homemade brass rods, with a T at the bottom. It means sitting and whistling in the dark (actually listening to Mozart) until the film is in the fix tank, but that is a small price to pay for the convenience. Some folks say that gives more even development than inverted SS tanks, but I have never been able to tell the difference.
PS: Although I really love the music of J.S. Bach, I like the sound of Mozart in the dark. Go figure.
The Honeywell Tilt-A-Mite flash will accept either the smaller M5 bulbs or the larger Press 25 bulbs. The socket self-adjusts to either size. You just press the bulb in and pull it out. The Press 25 bulbs will light up a large room, with a guide number in the hundreds. I have one that works, although I have never used it for a photo.