Mine are 2x2x2 wooden cubes. Yes, they do make a difference "in my system". Yes, the difference is subtle. I reached out to GR Research before I made these. I was told the lifters should not hold a static charge, and that wood was a good choice.
I have seen a lot of ideas concerning Cable lifters
I have seen a lot of ideas concerning Cable lifters and all seem to be pricy considering the value and appearance. But what if there was an answer that cost virtually nothing and you had the option to choose a multitude of designs and capabilities?
Glass is probably the best Neutral choice and what do we have in abundance. Used glasses (Goodwill). There are so many options around and possible just waiting one more day you can find exactly what you want and even if you don't like their choices there are options at stores that go far beyond what the High End Audio vendors offer. Here are a couple of examples: