Momiji is Japan's trusted brand when it comes to artist quality brushes. They are made of high quality Golden Taklon Acrylic Brushes in Nickel Plated Seamless Brass Ferrules and Pearl Enameled Wooden Long Handles. These synthetic brushes are made with a blend of dyed synthetic filaments which are handmade in Japan.  You can use this for acrylics and even oils to create details.

Note — Brush sizes are not standard across all manufacturers. You may expect a variation in the sizes of brushes since they may vary considerably depending on the manufacturer.