Designed for application of watercolors, temperas, oils, and acrylics Unique metal ferrules prevent paint buildup and easier to clean Four exciting sizes, including a large flat and filbert AP certified non-toxic and super safe for kids! Prang premium wood paint brushes feature ...Designed for application of watercolors, temperas, oils, and acrylics Unique metal ferrules prevent paint buildup and easier to clean Four exciting sizes, including a large flat and filbert AP certified non-toxic and super safe for kids! Prang premium wood paint brushes feature high-quality bristles, large grips, and seamless metal ferrules that prevent paint build-up. They are both AP certified non-toxic and conform to ASTM and ANSI safety standards. Each set includes 4 brushes in assorted sizes.