It comes with a lot for a reason; they don't last. The bristles are longer than the OEM. The extra length can be a factor in why the bristles detach so easily. The bristles get tangled in many things and pull out. They also get tangled and pull at each other. In addition, the bristles get stuck in the vacuum and are sucked off. The quality seems very bad. Now I can't even order them due to stock issues and Shark's own OEM parts shop is having technical difficulties. There is a clear lack of support for such expensive devices.
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