I had this idea od drawing where there is a contrast of packed lines and few lines. The bristles are the packed lines. I notice after uploading it that I haven’t got the circles right again. It’s funny how I don’t notice when I’m drawing it. The metal ferrule doesn’t look tubular.
![Paint brush](https://devyse.co.uk/wp-content/uploads/2021/07/20210603-1024x612.jpg)