Amazon カスタマー 5 The bristles are fairly thick, very stiff and therefore work well for removing large amounts of dirt, but due to the lack of thin/soft bristles it has trouble with taking off smaller dust particles.The large variety of brushes allowed me to find one that can reach every nook and cranny of my computer case and components, so I do recommend it for that.The one downside is that when it first arrived it has this terrible overpowering chemical smell, you *must* let it offgas outside for a while before using because the smell is simply unbearable, and gave me a migraine.