This Fine Round 4 brush from Callia Artist Brushes is a balance of innovative synthetics and precise craftsmanship. These brushes are great for acrylic, oil and watercolor painting. The handles are created with six layers to prevent cracking and the ferrules are made of solid brass. The innovative synthetic blends with modified filaments, hold and distribute pigment with even and consistent flow, enhance performance, are more affordable and have increased durability.