This set of three hog bristle spalter brushes by Talens Art Creation is suitable for oil colour and acrylics. The set contains the following types and sizes: 3 spalter brushes in sizes 30, 40 and 50. 
Spalter brushes are very wide, flat brushes that can be used to paint large areas or to prime your workspace with. 
Hog bristle (also called bristle) is a sturdy type of hair used for thicker paints, such as oil and acrylics. 
The hair is strong and resilient and leaves a visible brush stroke in the paint.