The Turbosmooth modifier is applied to the model (display in the viewport is 0 iterations, on the render 3 iterations)

Units of measurement: Millimeters
The bristles are made using Hair and Fur (there is a screenshot of the settings in the archive):
In the Custom Shader, assign the material "Нair"

The color of the material is easily changed in the Corona Color map

For Corona render, it is recommended to install a version at least 1.5, since the glossiness of the materials is configured with PBR in mind.