Filbert Brushes (#12) 35-302-11.75″ long The longest brush at 12″ is Jenkins Bright 35-301. The shortest brush at 7.5″ is the blender 35-306. This brush looks unused. Jenkins art brushes are. Tailored for his signature “Jenkins Technique,” these brushes are made from high-quality hog bristle, synthetic materials, and natural hair.