For example, if you are looking for brushes to use mainly for blending and glazing, the Utrecht® Series 231 Synthetic Golden Nylon Art Brushes are professional quality nylon flat art brushes are an economical choice for blending and glazing.
Or suppose you want the resiliency and feel of a Sable bristle brush at a more economical price, then Utrecht® Series 232 & 233 Synthetic White Taklon Art Brushes are a good choice.
The Utrecht online catalog tells what each type of brush is best suited for. Click the following link to see the various sizes that are available in flat, bright and round: Utrecht Synthetic and Blended Art Brushes for Oil and Acrylics
Information that can help you choose the right brushes:
A Guide to Selecting Art Brushes