What mediums can these brushes handle?

The nylon bristles are listed for acrylic, watercolor, oil, gouache and canvas art. Nylon is most at home with acrylic and gouache; for oil, clean thoroughly after each session.

Is this set good for a beginner?

Yes. The 24 assorted sizes let a beginner try broad washes and fine detail without buying brushes one at a time, and the case keeps them organized.

How do nylon brushes compare with natural-hair brushes?

Nylon is more durable and easier to clean, but it holds less water and feels less springy than sable or squirrel hair. For watercolor washes, natural hair still performs better.

What comes in the box?

The 24 brushes and a zippered case. No palette, paints or other tools are included.

How should I clean and store them?

Rinse with mild soap and cool water, reshape the bristles, and dry them flat or bristles-up. Store them in the zippered case to keep the tips from bending.