AMMO by MIG Paint Brushes - Brush Painting for Modelling
Item: #4 SYNTHETIC FILBERT BRUSH

From the Manufacturer:

This brush will allow us to blur and fuse colors to obtain very smooth transitions of color. It is also very suitable for working with decals and the specific liquids for them.

The Synthetic Brush range made of high-quality fibers, offers great spring. They are solvent-resistant and can be used with any paint type including acrylics, enamels, and oils. These are heavy duty brushes at a very economic price, making them a great option for all types of painting and weathering techniques and tasks