I am excited to find these in gray, as I have used black colored pot toes, from the same manufacturer for some time. The only issues I have is price related - these cost almost twice as much, which does not make a lot of sense. Pricing aside, they do what they are supposed to do and are easy to work with.
These do the job to raise the pot off the ground and allow water to drain. However, they're a nuisance if having to move the pot around. A one-piece riser works better.