Bought 2. One is much more shaky than the other so quality will vary. Generally these are fine. You get what you get for the price. Works great with my small monitor and the Feelworld backlight. Read the description for the overall height and note that it's not as sturdy as more expensive coasters. If the price matches your expectations, you probably won't be disappointed. In the end it worked great for me. I would put 4 apart from the difference in stability between them.
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