Synthetic Brush Round No. 4 d-4 mm ; L-18 mm wooden handle Calligrata

A brush made of synthetic bristles is a modern brush that is made of artificial bristles.

Red bristles - medium stiffness of brushes and medium thickness of bristles.
An optimal brush for gouache, tempera, acrylic, and oil.
Red synthetic bristles are slightly softer... than hog bristles.